| rial | (noun) the basic unit of money in Yemen; equal to 100 fils | Synonyms: Yemeni rial |
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| (noun) the basic unit of money in Iran | Synonyms: Iranian rial |
| (noun) the basic unit of money in Oman | Synonyms: Omani rial, riyal-omani |
| riata | (noun) a long noosed rope used to catch animals | Synonyms: lariat, lasso, reata |
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| rib | (noun) support resembling the rib of an animal | - |
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| (noun) a projecting molding on the underside of a vault or ceiling; may be ornamental or structural | - |
| (noun) any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates) | Synonyms: costa |
| (noun) a riblike supporting or strengthening part of an animal or plant | - |
| (noun) a teasing remark | - |
| (noun) cut of meat including one or more ribs | - |
| ribald | (noun) a ribald person; someone who uses vulgar and offensive language | - |
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| ribaldry | (noun) behavior or language bordering on indelicacy | Synonyms: gaminess, raciness, spiciness |
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| (noun) ribald humor | - |
| riband | (noun) a ribbon used as a decoration | Synonyms: ribband |
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| ribavirin | (noun) an inhaled antiviral agent (trade name Virazole) that may be used to treat serious virus infections | Synonyms: Virazole |
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| ribband | (noun) a ribbon used as a decoration | Synonyms: riband |
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| ribbing | (noun) the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances | Synonyms: tantalization, tease, teasing |
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| (noun) a framework of ribs | - |
| ribbon | (noun) notion consisting of a narrow strip of fine material used for trimming | - |
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| (noun) a long strip of inked material for making characters on paper with a typewriter | Synonyms: typewriter ribbon |
| (noun) an award for winning a championship or commemorating some other event | Synonyms: decoration, laurel wreath, medal, medallion, palm |
| (noun) any long object resembling a thin line | Synonyms: thread |
| ribbonfish | (noun) marine fish having a long compressed ribbonlike body | - |
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| (noun) thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin | Synonyms: king of the herring, oarfish, Regalecus glesne |
| ribbonwood | (noun) small tree or shrub of New Zealand having a profusion of axillary clusters of honey-scented paper-white flowers and whose bark is used for cordage | Synonyms: Hoheria populnea, houhere, lacebark |
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| (noun) deciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cotton | Synonyms: Plagianthus betulinus, Plagianthus regius, ribbon tree |
| ribgrass | (noun) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | Synonyms: buckthorn, English plantain, narrow-leaved plantain, Plantago lanceolata, ribwort, ripple-grass |
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| ribier | (noun) dark reddish-purple table grape of California | - |
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| riboflavin | (noun) a B vitamin that prevents skin lesions and weight loss | Synonyms: hepatoflavin, lactoflavin, ovoflavin, vitamin B2, vitamin G |
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| ribonuclease | (noun) a transferase that catalyzes the hydrolysis of ribonucleic acid | Synonyms: ribonucleinase, RNase |
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| ribonucleinase | (noun) a transferase that catalyzes the hydrolysis of ribonucleic acid | Synonyms: ribonuclease, RNase |
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| ribose | (noun) a pentose sugar important as a component of ribonucleic acid | - |
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| ribosome | (noun) an organelle in the cytoplasm of a living cell; they attach to mRNA and move down it one codon at a time and then stop until tRNA brings the required amino acid; when it reaches a stop codon it falls apart and releases the completed protein molecule for use by the cell | - |
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| ribwort | (noun) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | Synonyms: buckthorn, English plantain, narrow-leaved plantain, Plantago lanceolata, ribgrass, ripple-grass |
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| rice | (noun) grains used as food either unpolished or more often polished | - |
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| (noun) annual or perennial rhizomatous marsh grasses; seed used for food; straw used for paper | - |
| ricebird | (noun) migratory American songbird | Synonyms: bobolink, Dolichonyx oryzivorus, reedbird |
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| (noun) small finch-like Indonesian weaverbird that frequents rice fields | Synonyms: Java finch, Java sparrow, Padda oryzivora |
| ricegrass | (noun) any grass of the genus Oryzopsis | Synonyms: rice grass |
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| ricer | (noun) a kitchen utensil used for ricing soft foods by extruding them through small holes | - |
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| rich | (noun) people who have possessions and wealth (considered as a group) | Synonyms: rich people |
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| riches | (noun) an abundance of material possessions and resources | Synonyms: wealth |
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| richness | (noun) a strong deep vividness of hue | - |
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| (noun) the property of a sensation that is rich and pleasing | Synonyms: fullness, mellowness |
| (noun) the property of producing abundantly and sustaining vigorous and luxuriant growth | Synonyms: fertility, prolificacy, rankness |
| (noun) the property of being extremely abundant | Synonyms: cornucopia, profuseness, profusion |
| (noun) splendid or imposing in size or appearance | Synonyms: grandness, impressiveness, magnificence |
| (noun) the quality of having high intrinsic value | - |
| (noun) abundant wealth | Synonyms: affluence |
| richweed | (noun) a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves | Synonyms: clearweed, dead nettle, Pilea pumilla |
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| (noun) erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States | Synonyms: Collinsonia canadensis, horse balm, horseweed, stone-root, stone root, stoneroot |
| ricin | (noun) a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon | Synonyms: ricin toxin |
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| rick | (noun) a stack of hay | Synonyms: hayrick, haystack |
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| (noun) a painful muscle spasm especially in the neck or back (`rick' and `wrick' are British) | Synonyms: crick, kink, wrick |
| ricketiness | (noun) the quality of not being steady or securely fixed in place | Synonyms: unsteadiness |
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| rickets | (noun) childhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorus | Synonyms: rachitis |
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| rickettsia | (noun) any of a group of very small rod-shaped bacteria that live in biting arthropods (as ticks and mites) and cause disease in vertebrate hosts; they cause typhus and other febrile diseases in human beings | - |
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| rickettsialpox | (noun) mild infectious rickettsial disease caused by a bacterium of the genus Rickettsia transmitted to humans by the bite a mite that lives on rodents; characterized by chills and fever and headache and skin lesions that resemble chickenpox | - |
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| rickettsiosis | (noun) infectious disease caused by ticks or mites or body lice infected with rickettsial bacteria | Synonyms: rickettsial disease |
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| rickey | (noun) a mixed drink made of sweetened lime juice and soda water usually with liquor | - |
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| rickrack | (noun) a narrow zigzag ribbon used as trimming | Synonyms: ricrac |
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| ricksha | (noun) a small two-wheeled cart for one passenger; pulled by one person | Synonyms: jinrikisha, rickshaw |
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| rickshaw | (noun) a small two-wheeled cart for one passenger; pulled by one person | Synonyms: jinrikisha, ricksha |
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| ricochet | (noun) a glancing rebound | Synonyms: carom |
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| ricotta | (noun) soft Italian cheese like cottage cheese | - |
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| ricrac | (noun) a narrow zigzag ribbon used as trimming | Synonyms: rickrack |
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| rictus | (noun) a gaping grimace | - |
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| riddance | (noun) the act of forcing out someone or something | Synonyms: ejection, exclusion, expulsion |
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| (noun) the act of removing or getting rid of something | Synonyms: elimination |
| riddle | (noun) a coarse sieve (as for gravel) | - |
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| (noun) a difficult problem | Synonyms: brain-teaser, conundrum, enigma |
| ride | (noun) a journey in a vehicle (usually an automobile) | Synonyms: drive |
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| (noun) a mechanical device that you ride for amusement or excitement | - |
| rider | (noun) a clause that is appended to a legislative bill | - |
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| (noun) a traveler who actively rides an animal (as a horse or camel) | - |
| (noun) a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it | Synonyms: passenger |
| (noun) a traveler who actively rides a vehicle (as a bicycle or motorcycle) | - |
| ridge | (noun) a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters | Synonyms: ridgepole, rooftree |
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| (noun) any long raised border or margin of a bone or tooth or membrane | - |
| (noun) a long narrow natural elevation or striation | - |
| (noun) a long narrow range of hills | Synonyms: ridgeline |
| (noun) a long narrow natural elevation on the floor of the ocean | - |
| (noun) any long raised strip | - |
| ridgel | (noun) a colt with undescended testicles | Synonyms: ridgeling, ridgil, ridgling |
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| ridgeline | (noun) a long narrow range of hills | Synonyms: ridge |
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| ridgeling | (noun) a colt with undescended testicles | Synonyms: ridgel, ridgil, ridgling |
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| ridgepole | (noun) a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters | Synonyms: ridge, rooftree |
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| ridgil | (noun) a colt with undescended testicles | Synonyms: ridgel, ridgeling, ridgling |
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| ridgling | (noun) a colt with undescended testicles | Synonyms: ridgel, ridgeling, ridgil |
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| ridicule | (noun) the act of deriding or treating with contempt | Synonyms: derision |
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| (noun) language or behavior intended to mock or humiliate | - |
| ridiculer | (noun) a humorist who uses ridicule and irony and sarcasm | Synonyms: ironist, satirist |
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| ridiculousness | (noun) a message whose content is at variance with reason | Synonyms: absurdity, absurdness |
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| riding | (noun) travel by being carried on horseback | Synonyms: horseback riding |
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| (noun) the sport of sitting on the back of a horse while controlling its movements | Synonyms: equitation, horseback riding |
| ridley | (noun) a marine turtle | - |
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| riel | (noun) the basic unit of money in Cambodia; equal to 100 sen | - |
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| rifampin | (noun) an antibacterial drug (trade names Rifadin and Rimactane) used to treat tuberculosis | Synonyms: Rifadin, Rimactane |
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| riff | (noun) a jazz ostinato; usually provides a background for a solo improvisation | - |
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| riffle | (noun) shuffling by splitting the pack and interweaving the two halves at their corners | - |
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| (noun) a small wave on the surface of a liquid | Synonyms: ripple, rippling, wavelet |
| riffraff | (noun) disparaging terms for the common people | Synonyms: rabble, ragtag, ragtag and bobtail |
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| rifle | (noun) a shoulder firearm with a long barrel and a rifled bore | - |
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| riflebird | (noun) velvety black Australian bird of paradise with green and purple iridescence on head and tail | Synonyms: Ptloris paradisea |
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| rifleman | (noun) a soldier whose weapon is a rifle | - |
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| (noun) someone skilled in the use of a rifle | - |
| rifling | (noun) the cutting of spiral grooves on the inside of the barrel of a firearm | Synonyms: grooving |
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| rift | (noun) a personal or social separation (as between opposing factions) | Synonyms: breach, break, falling out, rupture, severance |
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| (noun) a narrow fissure in rock | - |
| (noun) a gap between cloud masses | - |
| rig | (noun) the act of swindling by some fraudulent scheme | Synonyms: cheat, fraud, swindle |
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| (noun) gear (including necessary machinery) for a particular enterprise | - |
| (noun) formation of masts, spars, sails, etc., on a vessel | Synonyms: rigging |
| (noun) a set of clothing (with accessories) | Synonyms: getup, outfit, turnout |
| (noun) a vehicle with wheels drawn by one or more horses | Synonyms: carriage, equipage |
| (noun) a truck consisting of a tractor and trailer together | Synonyms: articulated lorry, semi, tractor trailer, trailer truck, trucking rig |
| (noun) gear used in fishing | Synonyms: fishing gear, fishing rig, fishing tackle, tackle |
| rigamarole | (noun) a long and complicated and confusing procedure | Synonyms: rigmarole |
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| (noun) a set of confused and meaningless statements | Synonyms: rigmarole |
| rigatoni | (noun) tubular pasta in short ribbed pieces | - |
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| rigger | (noun) a long slender pointed sable brush used by artists | Synonyms: rigger brush |
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| (noun) a sailing vessel with a specified rig | - |
| (noun) someone who rigs ships | - |
| (noun) someone who works on an oil rig | Synonyms: oil rigger |
| rigging | (noun) gear consisting of ropes etc. supporting a ship's masts and sails | Synonyms: tackle |
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| (noun) formation of masts, spars, sails, etc., on a vessel | Synonyms: rig |
| right | (noun) a turn toward the side of the body that is on the south when the person is facing east | - |
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| (noun) the piece of ground in the outfield on the catcher's right | Synonyms: right field, rightfield |
| (noun) an abstract idea of that which is due to a person or governmental body by law or tradition or nature | - |
| (noun) anything in accord with principles of justice | Synonyms: rightfulness |
| (noun) the hand that is on the right side of the body | Synonyms: right hand |
| (noun) those who support political or social or economic conservatism; those who believe that things are better left unchanged | Synonyms: right wing |
| (noun) location near or direction toward the right side; i.e. the side to the south when a person or object faces east | - |
| (noun) (frequently plural) the interest possessed by law or custom in some intangible thing | - |
| righteousness | (noun) adhering to moral principles | - |
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| rightfield | (noun) the fielding position of the player on a baseball team who is expected to field balls in the right third of the outfield (looking from home plate) | Synonyms: right field |
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| (noun) the piece of ground in the outfield on the catcher's right | Synonyms: right, right field |
| rightfulness | (noun) anything in accord with principles of justice | Synonyms: right |
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| righthander | (noun) a person who uses the right hand more skillfully than the left | Synonyms: right-hander, right hander |
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| rightism | (noun) the ideology of the political right; belief in or support of the tenets of the political right | - |
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| rightist | (noun) a member of a right wing political party | Synonyms: right-winger |
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| rightness | (noun) according with conscience or morality | - |
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| (noun) conformity to fact or truth | Synonyms: correctness |
| (noun) appropriate conduct; doing the right thing | Synonyms: appropriateness |
| (noun) conformity with some esthetic standard of correctness or propriety | Synonyms: justness, nicety |
| rigidification | (noun) the process of becoming stiff or rigid | Synonyms: rigidifying, stiffening |
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| rigidifying | (noun) the process of becoming stiff or rigid | Synonyms: rigidification, stiffening |
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| rigidity | (noun) the physical property of being stiff and resisting bending | Synonyms: rigidness |
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| (noun) the quality of being rigid and rigorously severe | Synonyms: inflexibility, rigidness |
| rigidness | (noun) the physical property of being stiff and resisting bending | Synonyms: rigidity |
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| (noun) the quality of being rigid and rigorously severe | Synonyms: inflexibility, rigidity |
| rigmarole | (noun) a long and complicated and confusing procedure | Synonyms: rigamarole |
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| (noun) a set of confused and meaningless statements | Synonyms: rigamarole |
| rigor | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigorousness, rigour, rigourousness, severeness, severity |
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| (noun) the quality of being valid and rigorous | Synonyms: cogency, rigour, validity |
| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigorousness, rigour, rigourousness, severeness, severity, stiffness |
| rigorousness | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigour, rigourousness, severeness, severity |
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| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigour, rigourousness, severeness, severity, stiffness |
| rigour | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigorousness, rigourousness, severeness, severity |
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| (noun) the quality of being valid and rigorous | Synonyms: cogency, rigor, validity |
| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigorousness, rigourousness, severeness, severity, stiffness |
| rigourousness | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigorousness, rigour, severeness, severity |
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| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigorousness, rigour, severeness, severity, stiffness |
| rigout | (noun) a person's costume (especially if bizarre) | - |
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| rijstafel | (noun) dish originating in Indonesia; a wide variety of foods and sauces are served with rice | Synonyms: rijstaffel, rijsttaffel |
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| rijstaffel | (noun) dish originating in Indonesia; a wide variety of foods and sauces are served with rice | Synonyms: rijstafel, rijsttaffel |
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| rijsttaffel | (noun) dish originating in Indonesia; a wide variety of foods and sauces are served with rice | Synonyms: rijstafel, rijstaffel |
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| rilievo | (noun) sculpture consisting of shapes carved on a surface so as to stand out from the surrounding background | Synonyms: embossment, relief, relievo, sculptural relief |
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| rill | (noun) a small stream | Synonyms: rivulet, run, runnel, streamlet |
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| (noun) a small channel (as one formed by soil erosion) | - |
| rim | (noun) the top edge of a vessel or other container | Synonyms: brim, lip |
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| (noun) a projection used for strength or for attaching to another object | Synonyms: flange |
| (noun) the outer part of a wheel to which the tire is attached | - |
| (noun) (basketball) the hoop from which the net is suspended | - |
| (noun) the shape of a raised edge of a more or less circular object | - |
| rima | (noun) a narrow elongated opening or fissure between two symmetrical parts | - |
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| rime | (noun) correspondence in the sounds of two or more lines (especially final sounds) | Synonyms: rhyme |
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| (noun) ice crystals forming a white deposit (especially on objects outside) | Synonyms: frost, hoar, hoarfrost |