| ability | (noun) the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment | - |
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| (noun) possession of the qualities (especially mental qualities) required to do something or get something done | Synonyms: power |
| acceptability | (noun) satisfactoriness by virtue of conforming to approved standards | Synonyms: acceptableness |
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| accessibility | (noun) the quality of being at hand when needed | Synonyms: availability, availableness, handiness |
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| (noun) the attribute of being easy to meet or deal with | Synonyms: approachability |
| accountability | (noun) responsibility to someone or for some activity | Synonyms: answerability, answerableness |
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| achievability | (noun) the state of being achievable | Synonyms: attainability, attainableness |
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| adaptability | (noun) the ability to change (or be changed) to fit changed circumstances | - |
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| admirability | (noun) admirable excellence | Synonyms: admirableness, wonderfulness |
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| admissibility | (noun) acceptability by virtue of being admissible | - |
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| adorability | (noun) extreme attractiveness | Synonyms: adorableness |
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| advisability | (noun) the quality of being advisable | - |
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| affability | (noun) a disposition to be friendly and approachable (easy to talk to) | Synonyms: affableness, amiability, amiableness, bonhomie, geniality |
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| agreeability | (noun) a temperamental disposition to be agreeable | Synonyms: agreeableness |
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| algarobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarroba, algarrobilla |
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| algarrobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarroba |
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| alterability | (noun) the quality of being alterable | - |
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| amenability | (noun) the trait of being cooperative | Synonyms: amenableness, cooperativeness |
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| amiability | (noun) a disposition to be friendly and approachable (easy to talk to) | Synonyms: affability, affableness, amiableness, bonhomie, geniality |
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| (noun) a cheerful and agreeable mood | Synonyms: good humor, good humour, good temper |
| amicability | (noun) having a disposition characterized by warmth and friendliness | Synonyms: amicableness |
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| (noun) a disinclination to quarrel | Synonyms: amicableness |
| answerability | (noun) responsibility to someone or for some activity | Synonyms: accountability, answerableness |
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| applicability | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: pertinence, pertinency |
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| approachability | (noun) the attribute of being easy to meet or deal with | Synonyms: accessibility |
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| arability | (noun) the quality of land that is appropriate for cultivation | - |
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| assailability | (noun) vulnerability to forceful attack | - |
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| assibilation | (noun) pronunciation with a sibilant (hissing or whistling) sound | Synonyms: sibilation |
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| (noun) the development of a consonant phoneme into a sibilant | - |
| assimilability | (noun) Capability of being taken in and utilized as nourishment. | - |
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| associability | (noun) the capability of being easily associated or joined or connected in thought | Synonyms: associableness |
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| attainability | (noun) the state of being achievable | Synonyms: achievability, attainableness |
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| audibility | (noun) quality or fact or degree of being audible or perceptible by the ear | Synonyms: audibleness |
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| automobile | (noun) a motor vehicle with four wheels; usually propelled by an internal combustion engine | Synonyms: auto, car, machine, motorcar |
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| automobilist | (noun) someone who drives (or travels in) an automobile | Synonyms: motorist |
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| availability | (noun) the quality of being at hand when needed | Synonyms: accessibility, availableness, handiness |
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| believability | (noun) the quality of being believable or trustworthy | Synonyms: credibility, credibleness |
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| bendability | (noun) the property of being easily bent without breaking | Synonyms: pliability |
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| bilabial | (noun) a consonant that is articulated using both lips; /p/ or /b/ or /w/ | - |
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| bilateralism | (noun) the property of being symmetrical about a vertical plane | Synonyms: bilateral symmetry, bilaterality |
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| bilaterality | (noun) the property of being symmetrical about a vertical plane | Synonyms: bilateral symmetry, bilateralism |
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| bilberry | (noun) blue-black berries similar to American blueberries | Synonyms: European blueberry, whortleberry |
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| (noun) erect blueberry of western United States having solitary flowers and somewhat sour berries | Synonyms: mountain blue berry, thin-leaved bilberry, Viccinium membranaceum |
| (noun) erect European blueberry having solitary flowers and blue-black berries | Synonyms: blaeberry, Viccinium myrtillus, whinberry, whortleberry |
| bilby | (noun) bandicoot with leathery ears like a rabbit | Synonyms: Macrotis lagotis, rabbit-eared bandicoot, rabbit bandicoot |
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| bile | (noun) a digestive juice secreted by the liver and stored in the gallbladder; aids in the digestion of fats | Synonyms: gall |
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| bilestone | (noun) a calculus formed in the gall bladder or its ducts | Synonyms: gallstone |
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| bilge | (noun) where the sides of the vessel curve in to form the bottom | - |
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| (noun) water accumulated in the bilge of a ship | Synonyms: bilge water |
| bilges | (noun) in a vessel with two hulls, an enclosed area between the frames at each side | - |
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| bilgewater | (noun) pretentious or silly talk or writing | Synonyms: baloney, boloney, bosh, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
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| bilharzia | (noun) an infestation with or a resulting infection caused by a parasite of the genus Schistosoma; common in the tropics and Far East; symptoms depend on the part of the body infected | Synonyms: bilharziasis, schistosomiasis |
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| bilharziasis | (noun) an infestation with or a resulting infection caused by a parasite of the genus Schistosoma; common in the tropics and Far East; symptoms depend on the part of the body infected | Synonyms: bilharzia, schistosomiasis |
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| bilimbi | (noun) East Indian evergreen tree bearing very acid fruit | Synonyms: Averrhoa bilimbi |
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| bilingual | (noun) a person who speaks two languages fluently | Synonyms: bilingualist |
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| bilingualism | (noun) the ability to speak two languages colloquially | - |
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| bilingualist | (noun) a person who speaks two languages fluently | Synonyms: bilingual |
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| biliousness | (noun) a disposition to exhibit uncontrolled anger | Synonyms: irritability, peevishness, pettishness, snappishness, surliness, temper |
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| (noun) gastric distress caused by a disorder of the liver or gall bladder | - |
| bilirubin | (noun) an orange-yellow pigment in the bile that forms as a product of hemoglobin; excess amounts in the blood produce the yellow appearance observed in jaundice | Synonyms: haematoidin, hematoidin |
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| bill | (noun) the entertainment offered at a public presentation | - |
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| (noun) horny projecting mouth of a bird | Synonyms: beak, neb, nib, pecker |
| (noun) a brim that projects to the front to shade the eyes | Synonyms: eyeshade, peak, visor, vizor |
| (noun) a cutting tool with a sharp edge | Synonyms: billhook |
| (noun) a sign posted in a public place as an advertisement | Synonyms: card, notice, placard, poster, posting |
| (noun) an itemized statement of money owed for goods shipped or services rendered | Synonyms: account, invoice |
| (noun) an advertisement (usually printed on a page or in a leaflet) intended for wide distribution | Synonyms: broadsheet, broadside, circular, flier, flyer, handbill, throwaway |
| (noun) a statute in draft before it becomes law | Synonyms: measure |
| (noun) a list of particulars (as a playbill or bill of fare) | - |
| (noun) a piece of paper money (especially one issued by a central bank) | Synonyms: bank bill, bank note, banker's bill, banknote, Federal Reserve note, government note, greenback, note |
| billabong | (noun) a branch of a river made by water flowing from the main stream only when the water level is high | - |
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| (noun) a stagnant pool of water in the bed of a stream that flows intermittently | - |
| billboard | (noun) large outdoor signboard | Synonyms: hoarding |
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| billet | (noun) lodging for military personnel (especially in a private home) | - |
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| (noun) a short personal letter | Synonyms: line, note, short letter |
| billfish | (noun) giant warm-water game fish having a prolonged and rounded toothless upper jaw | - |
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| (noun) elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters | Synonyms: gar, needlefish |
| (noun) primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth | Synonyms: gar, garfish, garpike, Lepisosteus osseus |
| (noun) slender long-beaked fish of temperate Atlantic waters | Synonyms: saury, Scomberesox saurus |
| billfold | (noun) a pocket-size case for holding papers and paper money | Synonyms: notecase, pocketbook, wallet |
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| billhook | (noun) a cutting tool with a sharp edge | Synonyms: bill |
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| billiards | (noun) any of several games played on rectangular cloth-covered table (with cushioned edges) in which long tapering cue sticks are used to propel ivory (or composition) balls | - |
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| billing | (noun) request for payment of a debt | Synonyms: charge |
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| billingsgate | (noun) foul-mouthed or obscene abuse | Synonyms: scurrility |
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| billion | (noun) the number that is represented as a one followed by 9 zeros | Synonyms: 1000000000, one thousand million |
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| (noun) the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen | Synonyms: 1000000000000, one million million |
| (noun) a very large indefinite number (usually hyperbole) | Synonyms: bazillion, gazillion, jillion, million, trillion, zillion |
| billionaire | (noun) a very rich person whose material wealth is valued at more than a billion dollars | - |
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| billionth | (noun) one part in a billion equal parts | Synonyms: one-billionth |
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| (noun) position 1,000,000,000 in a countable series of things | - |
| billow | (noun) a large sea wave | Synonyms: surge |
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| billy | (noun) male goat | Synonyms: billy goat, he-goat |
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| (noun) a short stout club used primarily by policemen | Synonyms: baton, billy club, billystick, nightstick, truncheon |
| billyo | (noun) an unimaginably large amount | Synonyms: all get out, billy-ho, billyoh |
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| billyoh | (noun) an unimaginably large amount | Synonyms: all get out, billy-ho, billyo |
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| billystick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, nightstick, truncheon |
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| bilocation | (noun) the ability (said of certain Roman Catholic saints) to exist simultaneously in two locations | - |
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| bilsted | (noun) a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap | Synonyms: American sweet gum, Liquidambar styraciflua, red gum, sweet gum, sweet gum tree |
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| biltong | (noun) meat that is salted and cut into strips and dried in the sun | - |
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| bloodmobile | (noun) a motor vehicle equipped to collect blood donations | - |
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| bluebill | (noun) diving ducks of North America having a bluish-grey bill | Synonyms: broadbill, scaup, scaup duck |
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| boatbill | (noun) tropical American heron related to night herons | Synonyms: boat-billed heron, broadbill, Cochlearius cochlearius |
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| bombilation | (noun) sound of rapid vibration | Synonyms: bombination, buzz |
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| bookmobile | (noun) a van with shelves of books; serves as a mobile library or bookstore | - |
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| breakability | (noun) quality of being easily damaged or destroyed | Synonyms: fragility, frangibility, frangibleness |
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| broadbill | (noun) small birds of the Old World tropics having bright plumage and short wide bills | - |
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| (noun) freshwater duck of the Northern Hemisphere having a broad flat bill | Synonyms: Anas clypeata, shoveler, shoveller |
| (noun) diving ducks of North America having a bluish-grey bill | Synonyms: bluebill, scaup, scaup duck |
| (noun) tropical American heron related to night herons | Synonyms: boat-billed heron, boatbill, Cochlearius cochlearius |
| bulbil | (noun) small bulb or bulb-shaped growth arising from the leaf axil or in the place of flowers | Synonyms: bulblet |
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| burnability | (noun) the quality of being capable of igniting and burning | Synonyms: combustibility, combustibleness |
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| calculability | (noun) The quality of being subject to or ascertainable by calculation. | - |
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| capability | (noun) the quality of being capable -- physically or intellectually or legally | Synonyms: capableness |
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| (noun) an aptitude that may be developed | Synonyms: capableness, potentiality |
| (noun) the susceptibility of something to a particular treatment | Synonyms: capacity |
| changeability | (noun) the quality of being changeable; having a marked tendency to change | Synonyms: changeableness |
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| collectibility | (noun) The quality of being subject to payment or likely to be paid. | - |
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| combustibility | (noun) the quality of being capable of igniting and burning | Synonyms: burnability, combustibleness |
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| commutability | (noun) the quality of being commutable | Synonyms: transmutability |
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| (noun) exchangeability by virtue of being replaceable | Synonyms: replaceability, substitutability |
| companionability | (noun) suitability to be a companion | Synonyms: companionableness |
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| comparability | (noun) qualities that are comparable | Synonyms: compare, comparison, equivalence |
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| compatibility | (noun) capability of existing or performing in harmonious or congenial combination | - |
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| (noun) a feeling of sympathetic understanding | - |
| comprehensibility | (noun) the quality of comprehensible language or thought | Synonyms: understandability |
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| compressibility | (noun) the property of being able to occupy less space | Synonyms: sponginess, squeezability |
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| conceivability | (noun) the state of being conceivable | Synonyms: conceivableness |
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| contemptibility | (noun) unworthiness by virtue of lacking higher values | Synonyms: baseness, despicability, despicableness, sordidness |
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| convertibility | (noun) the quality of being exchangeable (especially the ability to convert a currency into gold or other currencies without restriction) | - |
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| corruptibility | (noun) the capability of being corrupted | - |
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| cranesbill | (noun) any of numerous geraniums of the genus Geranium | Synonyms: crane's bill |
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| credibility | (noun) the quality of being believable or trustworthy | Synonyms: believability, credibleness |
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| crossbill | (noun) finch with a bill whose tips cross when closed | Synonyms: Loxia curvirostra |
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| culpability | (noun) a state of guilt | Synonyms: blameworthiness, culpableness |
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