| insolubility | (noun) the quality of being insoluble and difficult to dissolve in liquid | - |
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| (noun) the property (of a problem or difficulty) that makes it impossible to solve | Synonyms: unsolvability |
| insubordination | (noun) an insubordinate act | Synonyms: rebelliousness |
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| (noun) defiance of authority | - |
| insubstantiality | (noun) lacking substance or reality | - |
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| (noun) lack of solid substance and strength | - |
| intubation | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulation, cannulisation, cannulization, canulation, canulisation, canulization |
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| jubilance | (noun) a feeling of extreme joy | Synonyms: exultation, jubilancy, jubilation |
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| jubilancy | (noun) a feeling of extreme joy | Synonyms: exultation, jubilance, jubilation |
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| jubilation | (noun) the utterance of sounds expressing great joy | Synonyms: exultation, rejoicing |
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| (noun) a joyful occasion for special festivities to mark some happy event | Synonyms: celebration |
| (noun) a feeling of extreme joy | Synonyms: exultation, jubilance, jubilancy |
| jubilee | (noun) a special anniversary (or the celebration of it) | - |
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| jujube | (noun) chewy fruit-flavored jellied candy (sometimes medicated to soothe a sore throat) | - |
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| (noun) dark red plumlike fruit of Old World buckthorn trees | Synonyms: Chinese date, Chinese jujube |
| (noun) spiny tree having dark red edible fruits | Synonyms: Christ's-thorn, Jerusalem thorn, jujube bush, Ziziphus jujuba |
| krubi | (noun) malodorous tropical plant having a spathe that resembles the corolla of a morning glory and attains a diameter of several feet | Synonyms: Amorphophallus titanum, titan arum |
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| landlubber | (noun) an inexperienced sailor; a sailor on the first voyage | Synonyms: landsman, lubber |
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| (noun) a person who lives and works on land | Synonyms: landman, landsman |
| lubber | (noun) an awkward stupid person | Synonyms: clod, gawk, goon, lout, lummox, lump, oaf, stumblebum |
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| (noun) an inexperienced sailor; a sailor on the first voyage | Synonyms: landlubber, landsman |
| lube | (noun) a substance capable of reducing friction by making surfaces smooth or slippery | Synonyms: lubricant, lubricating substance, lubricator |
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| lubricant | (noun) a substance capable of reducing friction by making surfaces smooth or slippery | Synonyms: lube, lubricating substance, lubricator |
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| lubrication | (noun) an application of a lubricant to something | - |
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| (noun) the condition of having been made smooth or slippery by the application of a lubricant | - |
| lubricator | (noun) a substance capable of reducing friction by making surfaces smooth or slippery | Synonyms: lube, lubricant, lubricating substance |
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| lubricity | (noun) feeling morbid sexual desire or a propensity to lewdness | Synonyms: carnality, lasciviousness, prurience, pruriency |
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| lucubration | (noun) laborious cogitation | - |
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| (noun) a solemn literary work that is the product of laborious cogitation | - |
| lugubriousness | (noun) the quality of excessive mournfulness and uncheerfulness | Synonyms: gloominess, sadness |
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| manubrium | (noun) the upper part of the breastbone | - |
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| microtubule | (noun) a microscopically small tubule | - |
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| minisub | (noun) submersible vessel for one or two persons; for naval operations or underwater exploration | Synonyms: minisubmarine |
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| minisubmarine | (noun) submersible vessel for one or two persons; for naval operations or underwater exploration | Synonyms: minisub |
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| moneygrubber | (noun) someone whose main interest in life is moneymaking | - |
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| nanotube | (noun) a fullerene molecule having a cylindrical or toroidal shape | Synonyms: carbon nanotube |
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| nightclub | (noun) a spot that is open late at night and that provides entertainment (as singers or dancers) as well as dancing and food and drink | Synonyms: cabaret, club, night club, nightspot |
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| nub | (noun) the choicest or most essential or most vital part of some idea or experience | Synonyms: center, centre, core, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, pith, substance, sum |
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| (noun) a small piece | Synonyms: stub |
| (noun) a small lump or protuberance | Synonyms: nubble |
| nubbin | (noun) a small nub (especially an undeveloped fruit or ear of corn) | - |
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| nubbiness | (noun) looseness or roughness in texture (as of cloth) | Synonyms: coarseness, tweediness |
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| nubble | (noun) a small lump or protuberance | Synonyms: nub |
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| oubliette | (noun) a dungeon with the only entrance or exit being a trap door in the ceiling | - |
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| pickelhaube | (noun) a spiked helmet worn by German soldiers | - |
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| prepuberty | (noun) a period of two years immediately prior to the onset of puberty when growth and changes leading to sexual maturity occur | - |
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| protuberance | (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, excrescence, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, swelling |
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| (noun) the condition of being protuberant; the condition of bulging out | - |
| pseudorubella | (noun) a viral disease of infants and young children; characterized by abrupt high fever and mild sore throat; a few days later there is a faint pinkish rash that lasts for a few hours to a few days | Synonyms: exanthema subitum, roseola infantilis, roseola infantum |
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| pub | (noun) tavern consisting of a building with a bar and public rooms; often provides light meals | Synonyms: gin mill, pothouse, public house, saloon, taphouse |
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| puberty | (noun) the time of life when sex glands become functional | Synonyms: pubescence |
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| pubes | (noun) the lower part of the abdomen just above the external genital organs | Synonyms: loins, pubic region |
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| pubescence | (noun) the time of life when sex glands become functional | Synonyms: puberty |
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| pubis | (noun) one of the three sections of the hipbone; together these two bones form the front of the pelvis | Synonyms: os pubis, pubic bone |
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| public | (noun) people in general considered as a whole | Synonyms: populace, world |
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| (noun) a body of people sharing some common interest | - |
| publican | (noun) the keeper of a public house | Synonyms: tavern keeper |
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| publication | (noun) the business of issuing printed matter for sale or distribution | Synonyms: publishing |
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| (noun) the act of issuing printed materials | Synonyms: issue |
| (noun) the communication of something to the public; making information generally known | - |
| (noun) a copy of a printed work offered for distribution | - |
| publiciser | (noun) someone who publicizes | Synonyms: publicist, publicizer |
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| publicist | (noun) someone who publicizes | Synonyms: publiciser, publicizer |
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| publicity | (noun) the quality of being open to public view | - |
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| (noun) a message issued in behalf of some product or cause or idea or person or institution | Synonyms: packaging, promo, promotion, promotional material |
| publicizer | (noun) someone who publicizes | Synonyms: publiciser, publicist |
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| publicizing | (noun) the business of drawing public attention to goods and services | Synonyms: advertising, merchandising |
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| publisher | (noun) a firm in the publishing business | Synonyms: publishing company, publishing firm, publishing house |
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| (noun) a person engaged in publishing periodicals or books or music | - |
| (noun) the proprietor of a newspaper | Synonyms: newspaper publisher |
| publishing | (noun) the business of issuing printed matter for sale or distribution | Synonyms: publication |
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| redoubt | (noun) an entrenched stronghold or refuge | - |
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| (noun) (military) a temporary or supplementary fortification; typically square or polygonal without flanking defenses | - |
| republic | (noun) a political system in which the supreme power lies in a body of citizens who can elect people to represent them | Synonyms: commonwealth, democracy |
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| (noun) a form of government whose head of state is not a monarch | - |
| republican | (noun) an advocate of a republic (usually in opposition to a monarchy) | - |
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| republicanism | (noun) the political orientation of those who hold that a republic is the best form of government | - |
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| republication | (noun) the act of publishing again | Synonyms: republishing |
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| (noun) something that has been published again; a fresh publication (as of a literary work) | - |
| republishing | (noun) the act of publishing again | Synonyms: republication |
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| rhubarb | (noun) long pinkish sour leafstalks usually eaten cooked and sweetened | Synonyms: pieplant |
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| (noun) plants having long green or reddish acidic leafstalks growing in basal clumps; stems (and only the stems) are edible when cooked; leaves are poisonous | Synonyms: rhubarb plant |
| rouble | (noun) the basic unit of money in Russia | Synonyms: ruble |
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| 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 | - |
| salubriousness | (noun) the quality of being salubrious and invigorating | Synonyms: salubrity |
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| salubrity | (noun) the quality of being salubrious and invigorating | Synonyms: salubriousness |
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| scrub | (noun) the act of cleaning a surface by rubbing it with a brush and soap and water | Synonyms: scouring, scrubbing |
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| (noun) dense vegetation consisting of stunted trees or bushes | Synonyms: bush, chaparral |
| scrubber | (noun) a purifier that removes impurities from a gas | - |
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| (noun) a brush with short stiff bristles for heavy cleaning | Synonyms: scrub brush, scrubbing brush |
| (noun) a worker who uses a scrub brush to clean a surface (usually a floor or deck) | - |
| scrubbiness | (noun) the property of being stunted and inferior in size or quality | Synonyms: scrawniness |
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| scrubbing | (noun) the act of cleaning a surface by rubbing it with a brush and soap and water | Synonyms: scouring, scrub |
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| scrubbird | (noun) small fast-running Australian bird resembling a wren and frequenting brush or scrub | Synonyms: scrub-bird, scrub bird |
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| scrubland | (noun) an uncultivated region covered with scrub vegetation | - |
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| scrubs | (noun) protective garment worn by surgeons during operations | Synonyms: gown, surgical gown |
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| scuba | (noun) a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus | Synonyms: Aqua-Lung, aqualung |
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| shrub | (noun) a low woody perennial plant usually having several major stems | Synonyms: bush |
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| shrubbery | (noun) a collection of shrubs growing together | - |
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| (noun) an area where a number of shrubs are planted | - |
| shrublet | (noun) dwarf shrub | - |
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| sillabub | (noun) sweetened cream beaten with wine or liquor | Synonyms: syllabub |
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| (noun) spiced hot milk with rum or wine | Synonyms: syllabub |
| slub | (noun) soft lump or unevenness in a yarn; either an imperfection or created by design | Synonyms: burl, knot |
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| snub | (noun) a refusal to recognize someone you know | Synonyms: cold shoulder, cut |
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| (noun) an instance of driving away or warding off | Synonyms: rebuff, repulse |
| solubility | (noun) the quality of being soluble and easily dissolved in liquid | - |
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| (noun) the property (of a problem or difficulty) that makes it possible to solve | Synonyms: solvability |
| (noun) the quantity of a particular substance that can dissolve in a particular solvent (yielding a saturated solution) | - |
| solubleness | (noun) the property of being dissoluble | Synonyms: dissolubility |
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| soubrette | (noun) a minor female role as a pert flirtatious lady's maid in a comedy | - |
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| (noun) a pert or flirtatious young girl | - |
| soubriquet | (noun) a familiar name for a person (often a shortened version of a person's given name) | Synonyms: byname, cognomen, moniker, nickname, sobriquet |
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| stub | (noun) the small unused part of something (especially the end of a cigarette that is left after smoking) | Synonyms: butt |
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| (noun) a torn part of a ticket returned to the holder as a receipt | Synonyms: ticket stub |
| (noun) the part of a check that is retained as a record | Synonyms: check stub, counterfoil |
| (noun) a short piece remaining on a trunk or stem where a branch is lost | - |
| (noun) a small piece | Synonyms: nub |
| stubbiness | (noun) the property of being short and broad | Synonyms: squatness |
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