| rub | (noun) the act of rubbing or wiping | Synonyms: wipe |
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| (noun) an unforeseen obstacle | Synonyms: hang-up, hitch, snag |
| rubato | (noun) a flexible tempo; not strictly on the beat | - |
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| rubber | (noun) a waterproof overshoe that protects shoes from water or snow | Synonyms: arctic, galosh, golosh, gumshoe |
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| (noun) contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse | Synonyms: condom, prophylactic, safe, safety |
| (noun) an eraser made of rubber (or of a synthetic material with properties similar to rubber); commonly mounted at one end of a pencil | Synonyms: pencil eraser, rubber eraser |
| (noun) a contest consisting of a series of successive matches between the same sides | - |
| (noun) an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products | Synonyms: caoutchouc, gum elastic, India rubber, natural rubber |
| (noun) any of various synthetic elastic materials whose properties resemble natural rubber | Synonyms: synthetic rubber |
| rubberneck | (noun) a person who stares inquisitively | Synonyms: rubbernecker |
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| (noun) a tourist who is visiting sights of interest | Synonyms: excursionist, sightseer, tripper |
| rubbernecker | (noun) a person who stares inquisitively | Synonyms: rubberneck |
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| rubbing | (noun) effort expended in moving one object over another with pressure | Synonyms: detrition, friction |
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| (noun) representation consisting of a copy (as of an engraving) made by laying paper over something and rubbing it with charcoal | - |
| (noun) the resistance encountered when one body is moved in contact with another | Synonyms: friction |
| rubbish | (noun) nonsensical talk or writing | Synonyms: applesauce, codswallop, folderol, trash, tripe, trumpery, wish-wash |
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| (noun) worthless material that is to be disposed of | Synonyms: scrap, trash |
| rubble | (noun) the remains of something that has been destroyed or broken up | Synonyms: debris, detritus, dust, junk |
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| rubdown | (noun) the act of rubbing down, usually for relaxation or medicinal purposes | - |
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| rube | (noun) a person who is not very intelligent or interested in culture | Synonyms: bumpkin, chawbacon, hayseed, hick, yahoo, yokel |
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| rubefacient | (noun) a medicine for external application that produces redness of the skin | - |
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| rubel | (noun) the basic unit of money in Belarus | - |
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| rubella | (noun) a contagious viral disease that is a milder form of measles lasting three or four days; can be damaging to a fetus during the first trimester | Synonyms: epidemic roseola, German measles, three-day measles |
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| rubeola | (noun) an acute and highly contagious viral disease marked by distinct red spots followed by a rash; occurs primarily in children | Synonyms: measles, morbilli |
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| rubicelle | (noun) a yellow or orange variety of ruby spinel | - |
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| rubidium | (noun) a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite | Synonyms: atomic number 37, Rb |
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| ruble | (noun) the basic unit of money in Russia | Synonyms: rouble |
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| (noun) the basic unit of money in Tajikistan | - |
| rubor | (noun) a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat | Synonyms: inflammation, redness |
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| rubric | (noun) category name | - |
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| (noun) a title or heading that is printed in red or in a special type | - |
| (noun) an explanation or definition of an obscure word in a text | Synonyms: gloss |
| (noun) an authoritative rule of conduct or procedure | - |
| (noun) directions for the conduct of Christian church services (often printed in red in a prayer book) | - |
| (noun) a heading that names a statute or legislative bill; may give a brief summary of the matters it deals with | Synonyms: statute title, title |
| ruby | (noun) a deep and vivid red color | Synonyms: crimson, deep red |
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| (noun) a transparent piece of ruby that has been cut and polished and is valued as a precious gem | - |
| (noun) a transparent deep red variety of corundum; used as a gemstone and in lasers | - |
| ruck | (noun) a crowd especially of ordinary or undistinguished persons or things | Synonyms: herd |
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| (noun) an irregular fold in an otherwise even surface (as in cloth) | Synonyms: pucker |
| rucksack | (noun) a bag carried by a strap on your back or shoulder | Synonyms: back pack, backpack, haversack, knapsack, packsack |
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| ruckus | (noun) the act of making a noisy disturbance | Synonyms: commotion, din, ruction, rumpus, tumult |
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| ruction | (noun) the act of making a noisy disturbance | Synonyms: commotion, din, ruckus, rumpus, tumult |
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| rudapithecus | (noun) fossil hominoids from northern central Hungary; late Miocene | Synonyms: Dryopithecus Rudapithecus hungaricus |
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| rudd | (noun) European freshwater fish resembling the roach | Synonyms: Scardinius erythrophthalmus |
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| rudder | (noun) (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel | - |
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| (noun) a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes | - |
| rudderfish | (noun) fish having the habit of following ships; found in North American and South American coastal waters | Synonyms: banded rudderfish, Seriola zonata |
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| (noun) food and game fish around Bermuda and Florida; often follow ships | Synonyms: Bermuda chub, Kyphosus sectatrix |
| rudderpost | (noun) a vertical post at the forward edge of a rudder that enables the rudder to pivot | Synonyms: rudderstock |
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| rudderstock | (noun) a vertical post at the forward edge of a rudder that enables the rudder to pivot | Synonyms: rudderpost |
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| ruddiness | (noun) a healthy reddish complexion | Synonyms: rosiness |
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| ruddle | (noun) a red iron ore used in dyeing and marking | Synonyms: raddle, reddle |
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| ruddles | (noun) the common European annual marigold | Synonyms: Calendula officinalis, common marigold, pot marigold, Scotch marigold |
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| rudeness | (noun) a manner that is rude and insulting | Synonyms: discourtesy |
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| (noun) a wild or unrefined state | Synonyms: crudeness, crudity, primitiveness, primitivism |
| rudiment | (noun) the remains of a body part that was functional at an earlier stage of life | - |
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| rudiments | (noun) the elementary stages of any subject (usually plural) | Synonyms: alphabet, first principles |
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| (noun) a statement of fundamental facts or principles | Synonyms: basics |
| rue | (noun) (French) a street or road in France | - |
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| (noun) sadness associated with some wrong done or some disappointment | Synonyms: regret, ruefulness, sorrow |
| (noun) leaves sometimes used for flavoring fruit or claret cup but should be used with great caution: can cause irritation like poison ivy | - |
| (noun) European strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy | Synonyms: herb of grace, Ruta graveolens |
| ruefulness | (noun) sadness associated with some wrong done or some disappointment | Synonyms: regret, rue, sorrow |
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| ruff | (noun) (card games) the act of taking a trick with a trump when unable to follow suit | Synonyms: trumping |
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| (noun) common Eurasian sandpiper; the male has an erectile neck ruff in breeding season | Synonyms: Philomachus pugnax |
| (noun) a high tight collar | Synonyms: choker, neck ruff, ruffle |
| (noun) an external body part consisting of feathers or hair about the neck of a bird or other animal | Synonyms: frill |
| ruffian | (noun) a cruel and brutal fellow | Synonyms: bully, hooligan, roughneck, rowdy, tough, yob, yobbo, yobo |
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| ruffianism | (noun) violent lawless behavior | - |
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| ruffle | (noun) a noisy fight | Synonyms: affray, disturbance, fray |
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| (noun) a high tight collar | Synonyms: choker, neck ruff, ruff |
| (noun) a strip of pleated material used as a decoration or a trim | Synonyms: flounce, frill, furbelow |
| rug | (noun) floor covering consisting of a piece of thick heavy fabric (usually with nap or pile) | Synonyms: carpet, carpeting |
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| ruga | (noun) (anatomy) a fold or wrinkle or crease | - |
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| rugby | (noun) a form of football played with an oval ball | Synonyms: rugby football, rugger |
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| rugelach | (noun) pastry made with a cream cheese dough and different fillings (as raisins and walnuts and cinnamon or chocolate and walnut and apricot preserves) | Synonyms: ruggelach, rugulah |
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| ruggedisation | (noun) the act of making a piece of equipment rugged (strengthening to resist wear or abuse) | Synonyms: ruggedization |
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| ruggedization | (noun) the act of making a piece of equipment rugged (strengthening to resist wear or abuse) | Synonyms: ruggedisation |
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| ruggedness | (noun) the property of being big and strong | Synonyms: huskiness, toughness |
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| (noun) the quality of being topologically uneven | - |
| (noun) the quality of being difficult to do | Synonyms: hardness |
| ruggelach | (noun) pastry made with a cream cheese dough and different fillings (as raisins and walnuts and cinnamon or chocolate and walnut and apricot preserves) | Synonyms: rugelach, rugulah |
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| rugger | (noun) a form of football played with an oval ball | Synonyms: rugby, rugby football |
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| rugulah | (noun) pastry made with a cream cheese dough and different fillings (as raisins and walnuts and cinnamon or chocolate and walnut and apricot preserves) | Synonyms: rugelach, ruggelach |
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| ruin | (noun) destruction achieved by causing something to be wrecked or ruined | Synonyms: laying waste, ruination, ruining, wrecking |
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| (noun) a ruined building | - |
| (noun) an event that results in destruction | Synonyms: ruination |
| (noun) failure that results in a loss of position or reputation | Synonyms: downfall, ruination |
| (noun) the process of becoming dilapidated | Synonyms: dilapidation |
| (noun) an irrecoverable state of devastation and destruction | Synonyms: ruination |
| ruination | (noun) destruction achieved by causing something to be wrecked or ruined | Synonyms: laying waste, ruin, ruining, wrecking |
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| (noun) an event that results in destruction | Synonyms: ruin |
| (noun) failure that results in a loss of position or reputation | Synonyms: downfall, ruin |
| (noun) an irrecoverable state of devastation and destruction | Synonyms: ruin |
| ruiner | (noun) a person who destroys or ruins or lays waste to | Synonyms: destroyer, undoer, uprooter, waster |
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| ruining | (noun) destruction achieved by causing something to be wrecked or ruined | Synonyms: laying waste, ruin, ruination, wrecking |
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| ruinousness | (noun) The quality of causing or tending to cause ruin. | - |
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| rule | (noun) measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths | Synonyms: ruler |
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| (noun) a principle or condition that customarily governs behavior | Synonyms: regulation |
| (noun) something regarded as a normative example | Synonyms: convention, formula, normal, pattern |
| (noun) a rule or law concerning a natural phenomenon or the function of a complex system | Synonyms: principle |
| (noun) a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct | Synonyms: principle |
| (noun) (mathematics) a standard procedure for solving a class of mathematical problems | Synonyms: formula |
| (noun) prescribed guide for conduct or action | Synonyms: prescript |
| (noun) (linguistics) a rule describing (or prescribing) a linguistic practice | Synonyms: linguistic rule |
| (noun) directions that define the way a game or sport is to be conducted | - |
| (noun) any one of a systematic body of regulations defining the way of life of members of a religious order | - |
| (noun) dominance or power through legal authority | Synonyms: dominion |
| (noun) the duration of a monarch's or government's power | - |
| ruler | (noun) measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths | Synonyms: rule |
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| (noun) a person who rules or commands | Synonyms: swayer |
| rulership | (noun) the position of ruler | - |
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| ruling | (noun) the reason for a court's judgment (as opposed to the decision itself) | Synonyms: opinion |
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| rum | (noun) a card game based on collecting sets and sequences; the winner is the first to meld all their cards | Synonyms: rummy |
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| (noun) liquor distilled from fermented molasses | - |
| rumba | (noun) a folk dance in duple time that originated in Cuba with Spanish and African elements; features complex footwork and violent movement | Synonyms: rhumba |
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| (noun) a ballroom dance based on the Cuban folk dance | Synonyms: rhumba |
| (noun) syncopated music in duple time for dancing the rumba | Synonyms: rhumba |
| rumble | (noun) a fight between rival gangs of adolescents | Synonyms: gang fight |
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| (noun) a servant's seat (or luggage compartment) in the rear of a carriage | - |
| (noun) a loud low dull continuous noise | Synonyms: grumble, grumbling, rumbling |
| rumbling | (noun) a loud low dull continuous noise | Synonyms: grumble, grumbling, rumble |
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| rumen | (noun) the first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewing | Synonyms: first stomach |
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| ruminant | (noun) any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartments | - |
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| rumination | (noun) regurgitation of small amounts of food; seen in some infants after feeding | - |
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| (noun) (of ruminants) chewing (the cud) | - |
| (noun) a calm, lengthy, intent consideration | Synonyms: contemplation, musing, reflection, reflexion, thoughtfulness |
| ruminator | (noun) a reflective thinker characterized by quiet contemplation | Synonyms: muller, muser, ponderer |
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| rummage | (noun) a thorough search for something (often causing disorder or confusion) | Synonyms: ransacking |
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| (noun) a jumble of things to be given away | - |
| rummer | (noun) a large drinking glass (ovoid bowl on a stem) for drinking toasts | - |
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| rummy | (noun) a card game based on collecting sets and sequences; the winner is the first to meld all their cards | Synonyms: rum |
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| (noun) a chronic drinker | Synonyms: drunk, drunkard, inebriate, sot, wino |
| rumor | (noun) gossip (usually a mixture of truth and untruth) passed around by word of mouth | Synonyms: hearsay, rumour |
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| rumormonger | (noun) a person given to gossiping and divulging personal information about others | Synonyms: gossip, gossiper, gossipmonger, newsmonger, rumourmonger |
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| rumour | (noun) gossip (usually a mixture of truth and untruth) passed around by word of mouth | Synonyms: hearsay, rumor |
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| rumourmonger | (noun) a person given to gossiping and divulging personal information about others | Synonyms: gossip, gossiper, gossipmonger, newsmonger, rumormonger |
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| rump | (noun) the part of an animal that corresponds to the human buttocks | Synonyms: croup, croupe, hindquarters |
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| (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, seat, stern, tail, tail end, tooshie, tush |
| (noun) fleshy hindquarters; behind the loin and above the round | - |
| rumpus | (noun) the act of making a noisy disturbance | Synonyms: commotion, din, ruckus, ruction, tumult |
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| rumrunner | (noun) someone who illegally smuggles liquor across a border | - |
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| run | (noun) the act of running; traveling on foot at a fast pace | Synonyms: running |
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| (noun) a score in baseball made by a runner touching all four bases safely | Synonyms: tally |
| (noun) (American football) a play in which a player attempts to carry the ball through or past the opposing team | Synonyms: running, running game, running play |
| (noun) a regular trip | - |
| (noun) a short trip | - |
| (noun) the act of testing something | Synonyms: test, trial |
| (noun) an unbroken chronological sequence | - |
| (noun) the pouring forth of a fluid | Synonyms: discharge, outpouring |
| (noun) a row of unravelled stitches | Synonyms: ladder, ravel |
| (noun) a race run on foot | Synonyms: foot race, footrace |
| (noun) a race between candidates for elective office | Synonyms: campaign, political campaign |
| (noun) an unbroken series of events | Synonyms: streak |
| (noun) a small stream | Synonyms: rill, rivulet, runnel, streamlet |
| (noun) the production achieved during a continuous period of operation (of a machine or factory etc.) | - |
| (noun) unrestricted freedom to use | - |
| (noun) the continuous period of time during which something (a machine or a factory) operates or continues in operation | - |
| runabout | (noun) an open automobile having a front seat and a rumble seat | Synonyms: roadster, two-seater |
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| runaway | (noun) an easy victory | Synonyms: blowout, laugher, romp, shoo-in, walkaway |
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| (noun) someone who flees from an uncongenial situation | Synonyms: fleer, fugitive |
| runch | (noun) Eurasian weed having yellow or mauve or white flowers and podlike fruits | Synonyms: jointed charlock, Raphanus raphanistrum, wild radish, wild rape |
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| rundle | (noun) one of the crosspieces that form the steps of a ladder | Synonyms: rung, spoke |
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| rundown | (noun) a concluding summary (as in presenting a case before a law court) | Synonyms: summation, summing up |
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| rune | (noun) any character from an ancient Germanic alphabet used in Scandinavia from the 3rd century to the Middle Ages | Synonyms: runic letter |
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| rung | (noun) one of the crosspieces that form the steps of a ladder | Synonyms: rundle, spoke |
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| (noun) a crosspiece between the legs of a chair | Synonyms: round, stave |
| runnel | (noun) a small stream | Synonyms: rill, rivulet, run, streamlet |
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| runner | (noun) fish of western Atlantic: Cape Cod to Brazil | Synonyms: blue runner, Caranx crysos |
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| (noun) device consisting of the parts on which something can slide along | - |
| (noun) a long narrow carpet | - |
| (noun) a trained athlete who competes in foot races | - |
| (noun) someone who imports or exports without paying duties | Synonyms: contrabandist, moon-curser, moon curser, smuggler |
| (noun) a baseball player on the team at bat who is on base (or attempting to reach a base) | Synonyms: base runner |
| (noun) someone who travels on foot by running | - |
| (noun) a person who is employed to deliver messages or documents | - |
| (noun) (football) the player who is carrying (and trying to advance) the ball on an offensive play | Synonyms: ball carrier |
| (noun) a horizontal branch from the base of plant that produces new plants from buds at its tips | Synonyms: offset, stolon |
| runniness | (noun) the property of flowing easily | Synonyms: fluidity, fluidness, liquidity, liquidness |
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| running | (noun) the act of participating in an athletic competition involving running on a track | Synonyms: track |
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| (noun) the act of running; traveling on foot at a fast pace | Synonyms: run |
| (noun) the act of administering or being in charge of something | - |
| (noun) (American football) a play in which a player attempts to carry the ball through or past the opposing team | Synonyms: run, running game, running play |
| (noun) the state of being in operation | - |
| runoff | (noun) a final election to resolve an earlier election that did not produce a winner | - |
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| (noun) the occurrence of surplus liquid (as water) exceeding the limit or capacity | Synonyms: overflow, overspill |
| runt | (noun) disparaging terms for small people | Synonyms: half-pint, peewee, shrimp |
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| runtiness | (noun) smallness of stature | Synonyms: puniness, stuntedness |
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| runup | (noun) a substantial increase over a relatively short period of time | Synonyms: run-up |
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| runway | (noun) a strip of level paved surface where planes can take off and land | - |
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| (noun) a narrow platform extending from the stage into the audience in a theater or nightclub etc. | - |
| (noun) a bar or pair of parallel bars of rolled steel making the railway along which railroad cars or other vehicles can roll | Synonyms: rail, rails, track |
| (noun) a chute down which logs can slide | - |
| rupee | (noun) the basic unit of money in India; equal to 100 paise | Synonyms: Indian rupee |
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| (noun) the basic unit of money in Pakistan; equal to 100 paisa | Synonyms: Pakistani rupee |
| (noun) the basic unit of money in Mauritius; equal to 100 cents | Synonyms: Mauritian rupee |
| (noun) the basic unit of money in Nepal; equal to 100 paisa | Synonyms: Nepalese rupee |
| (noun) the basic unit of money in Seychelles; equal to 100 cents | Synonyms: Seychelles rupee |
| (noun) the basic unit of money in Sri Lanka; equal to 100 cents | Synonyms: Sri Lanka rupee |
| rupiah | (noun) the basic unit of money in Indonesia; equal to 100 sen | - |
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| rupture | (noun) the act of making a sudden noisy break | - |
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| (noun) a personal or social separation (as between opposing factions) | Synonyms: breach, break, falling out, rift, severance |
| (noun) state of being torn or burst open | - |
| rupturewort | (noun) common prostrate Old World herb often used as a ground cover; formerly reputed to cure ruptures | Synonyms: Hernaria glabra |
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