| avail | (noun) a means of serving | Synonyms: help, service |
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| (verb) take advantage of | - |
| (verb) take or use | Synonyms: help |
| (verb) be of use to, be useful to | - |
| aventail | (noun) a medieval hood of mail suspended from a basinet to protect the head and neck | Synonyms: camail, ventail |
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| avifaunal | (adjective) of or relating to birds of a particular region or period | Synonyms: avifaunistic |
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| avocational | (adjective) of or involved in an avocation | - |
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| avowal | (noun) a statement asserting the existence or the truth of something | Synonyms: affirmation, avouchment |
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| awful | (adjective) offensive or even (of persons) malicious | Synonyms: nasty |
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| (adjective) causing fear or dread or terror | Synonyms: dire, direful, dread, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible |
| (adjective) exceptionally bad or displeasing | Synonyms: abominable, atrocious, dreadful, painful, terrible, unspeakable |
| (adjective) extreme in degree or extent or amount or impact | Synonyms: frightful, terrible, tremendous |
| (adjective) inspiring awe or admiration or wonder | Synonyms: amazing, awe-inspiring, awesome, awing |
| (adjective) inspired by a feeling of fearful wonderment or reverence | Synonyms: awed |
| (adverb) used as intensifiers | Synonyms: awfully, frightfully, terribly |
| awheel | (adjective) traveling by wheeled vehicle such as bicycle or automobile e.g. | - |
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| awl | (noun) a pointed tool for marking surfaces or for punching small holes | - |
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| awol | (adjective) absent without permission | Synonyms: truant |
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| axerophthol | (noun) any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes | Synonyms: A, antiophthalmic factor, vitamin A |
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| axial | (adjective) of or relating to or resembling an axis of rotation | - |
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| (adjective) relating to or attached to the axis | Synonyms: axile |
| (adjective) situated on or along or in the direction of an axis | - |
| axil | (noun) the upper angle between an axis and an offshoot such as a branch or leafstalk | - |
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| axiological | (adjective) of or relating to the study of values | - |
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| axiomatical | (adjective) of or relating to or derived from axioms | Synonyms: axiomatic, postulational |
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| axolotl | (noun) larval salamander of mountain lakes of Mexico that usually lives without metamorphosing | Synonyms: Ambystoma mexicanum, mud puppy |
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| axonal | (adjective) of or relating to or resembling an axon | - |
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| azimuthal | (adjective) of or relating to or in azimuth | - |
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| azonal | (adjective) not divided into zones | - |
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| babel | (noun) a confusion of voices and other sounds | - |
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| bacchanal | (adjective) used of riotously drunken merrymaking | Synonyms: bacchanalian, bacchic, carousing, orgiastic |
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| (noun) a wild gathering involving excessive drinking and promiscuity | Synonyms: bacchanalia, debauch, debauchery, drunken revelry, orgy, riot, saturnalia |
| (noun) someone who engages in drinking bouts | Synonyms: bacchant, drunken reveler, drunken reveller |
| (noun) a drunken reveller; a devotee of Bacchus | Synonyms: bacchant |
| backpedal | (verb) modify one's opinion, make it less strong | - |
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| (verb) pedal backwards on a bicycle | - |
| (verb) step backwards, in boxing | - |
| bacterial | (adjective) relating to or caused by bacteria | - |
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| bactericidal | (adjective) preventing infection by inhibiting the growth or action of microorganisms | Synonyms: disinfectant, germicidal |
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| bacteriochlorophyll | (noun) a substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants | - |
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| bacterioidal | (adjective) resembling bacteria | Synonyms: bacterioid, bacteroid, bacteroidal |
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| bacteriological | (adjective) of or relating to bacteriology | Synonyms: bacteriologic |
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| bacteroidal | (adjective) resembling bacteria | Synonyms: bacterioid, bacterioidal, bacteroid |
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| bagel | (noun) (Yiddish) glazed yeast-raised doughnut-shaped roll with hard crust | Synonyms: beigel |
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| bagful | (noun) the quantity that a bag will hold | Synonyms: bag |
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| bail | (noun) the legal system that allows an accused person to be temporarily released from custody (usually on condition that a sum of money guarantees their appearance at trial) | - |
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| (noun) (criminal law) money that must be forfeited by the bondsman if an accused person fails to appear in court for trial | Synonyms: bail bond, bond |
| (verb) remove (water) from a vessel with a container | - |
| (verb) empty (a vessel) by bailing | - |
| (verb) secure the release of (someone) by providing security | - |
| (verb) deliver something in trust to somebody for a special purpose and for a limited period | - |
| (verb) release after a security has been paid | - |
| baleful | (adjective) threatening or foreshadowing evil or tragic developments | Synonyms: forbidding, menacing, minacious, minatory, ominous, sinister, threatening |
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| (adjective) deadly or sinister | Synonyms: baneful |
| ball | (noun) a pitch that is not in the strike zone | - |
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| (noun) a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs | Synonyms: baseball, baseball game |
| (noun) round object that is hit or thrown or kicked in games | - |
| (noun) a spherical object used as a plaything | - |
| (noun) a solid projectile that is shot by a musket | Synonyms: musket ball |
| (noun) a more or less rounded anatomical body or mass | - |
| (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ballock, bollock, egg, nut, orchis, testicle, testis |
| (noun) a lavish dance requiring formal attire | Synonyms: formal |
| (noun) a compact mass | Synonyms: chunk, clod, clump, glob, lump |
| (noun) an object with a spherical shape | Synonyms: globe, orb |
| (verb) form into a ball by winding or rolling | - |
| (verb) to live very well | - |
| balmoral | (noun) a sturdy laced walking shoe | - |
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| banal | (adjective) repeated too often; overfamiliar through overuse | Synonyms: commonplace, hackneyed, old-hat, shopworn, stock, threadbare, timeworn, tired, trite, well-worn |
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| bandtail | (noun) wild pigeon of western North America; often mistaken for the now extinct passenger pigeon | Synonyms: band-tail pigeon, band-tailed pigeon, Columba fasciata |
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| baneful | (adjective) deadly or sinister | Synonyms: baleful |
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| (adjective) exceedingly harmful | Synonyms: deadly, pernicious, pestilent |
| bangtail | (noun) a horse bred for racing | Synonyms: race horse, racehorse |
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| bankroll | (noun) a roll of currency notes (often taken as the resources of a person or business etc.) | Synonyms: roll |
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| (verb) provide with sufficient funds; finance | - |
| baptismal | (adjective) of or relating to baptism | - |
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| barbel | (noun) slender tactile process on the jaws of a fish | Synonyms: feeler |
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| barbell | (noun) a bar to which heavy discs are attached at each end; used in weightlifting | - |
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| barbital | (noun) a barbiturate used as a hypnotic | Synonyms: barbitone, diethylbarbituric acid, diethylmalonylurea, veronal |
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| barnful | (noun) the quantity that a barn will hold | - |
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| barometrical | (adjective) relating to atmospheric pressure or indicated by a barometer | Synonyms: barometric |
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| baronial | (adjective) impressive in size, manner, or appearance | Synonyms: imposing, noble, stately |
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| barrel | (noun) a cylindrical container that holds liquids | Synonyms: cask |
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| (noun) a tube through which a bullet travels when a gun is fired | Synonyms: gun barrel |
| (noun) any of various units of capacity | Synonyms: bbl |
| (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrelful |
| (noun) a bulging cylindrical shape; hollow with flat ends | Synonyms: drum |
| (verb) put in barrels | - |
| barrelful | (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrel |
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| barrowful | (noun) the quantity that a barrow will hold | Synonyms: barrow |
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| basal | (adjective) especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem | Synonyms: radical |
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| (adjective) serving as or forming a base | Synonyms: base |
| (adjective) of or being the essential or basic part | Synonyms: elemental, elementary, primary |
| baseball | (noun) a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs | Synonyms: ball, baseball game |
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| (noun) a ball used in playing baseball | - |
| bashful | (adjective) disposed to avoid notice | Synonyms: blate |
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| (adjective) self-consciously timid | - |
| basidial | (adjective) relating to or characterized by basidia | - |
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| basil | (noun) leaves of the common basil; used fresh or dried | Synonyms: sweet basil |
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| (noun) any of several Old World tropical aromatic annual or perennial herbs of the genus Ocimum | - |
| basinal | (adjective) of or relating to a basin | - |
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| basinful | (noun) the quantity that a basin will hold | Synonyms: basin |
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| basipetal | (adjective) of leaves or flowers; developing or opening in succession from apex to base | - |
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| basketball | (noun) a game played on a court by two opposing teams of 5 players; points are scored by throwing the ball through an elevated horizontal hoop | Synonyms: basketball game, hoops |
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| (noun) an inflated ball used in playing basketball | - |
| basketful | (noun) the quantity contained in a basket | Synonyms: basket |
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| basophil | (noun) a leukocyte with basophilic granules easily stained by basic stains | Synonyms: basophile |
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| batfowl | (verb) catch birds by temporarily blinding them | - |
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| bathyal | (adjective) relating to ocean depths between 200 and 2000 meters (corresponds to the continental slope) | - |
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| bathymetrical | (adjective) of or relating to measurements of the depths of oceans or lakes | Synonyms: bathymetric |
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| battleful | (adjective) having or showing a ready disposition to fight | Synonyms: bellicose, combative |
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| bawl | (verb) cry loudly | - |
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| (verb) shout loudly and without restraint | Synonyms: bellow |
| (verb) make a raucous noise | Synonyms: yawp |
| bbl | (noun) any of various units of capacity | Synonyms: barrel |
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| beachball | (noun) large and light ball; for play at the seaside | Synonyms: beach ball |
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| beanball | (noun) a baseball deliberately thrown at the batter's head | Synonyms: beaner |
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| beautiful | (adjective) delighting the senses or exciting intellectual or emotional admiration | - |
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| (adjective) (of weather) highly enjoyable | - |
| bechamel | (noun) milk thickened with a butter and flour roux | Synonyms: bechamel sauce, white sauce |
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| bedevil | (verb) be confusing or perplexing to; cause to be unable to think clearly | Synonyms: befuddle, confound, confuse, discombobulate, fox, fuddle, throw |
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| (verb) treat cruelly | Synonyms: crucify, dun, frustrate, rag, torment |
| bedroll | (noun) bedding rolled up for carrying | - |
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| befall | (verb) happen, occur, or be the case in the course of events or by chance | Synonyms: bechance, happen |
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| (verb) become of; happen to | Synonyms: bechance, betide |
| befool | (verb) fool or hoax | Synonyms: cod, dupe, fool, gull, put on, put one across, put one over, slang, take in |
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| (verb) make a fool or dupe of | Synonyms: fool, gull |
| befoul | (verb) spot, stain, or pollute | Synonyms: defile, foul, maculate |
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| behavioral | (adjective) of or relating to behavior | Synonyms: behavioural |
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| behavioural | (adjective) of or relating to behavior | Synonyms: behavioral |
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| beigel | (noun) (Yiddish) glazed yeast-raised doughnut-shaped roll with hard crust | Synonyms: bagel |
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| bejewel | (verb) adorn or decorate with precious stones | Synonyms: jewel |
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| bell | (noun) a hollow device made of metal that makes a ringing sound when struck | - |
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| (noun) a push button at an outer door that gives a ringing or buzzing signal when pushed | Synonyms: buzzer, doorbell |
| (noun) the flared opening of a tubular device | - |
| (noun) a percussion instrument consisting of a set of tuned bells that are struck with a hammer; used as an orchestral instrument | Synonyms: chime, gong |
| (noun) the sound of a bell being struck | Synonyms: toll |
| (noun) the shape of a bell | Synonyms: bell shape, campana |
| (noun) (nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m. | Synonyms: ship's bell |
| (verb) attach a bell to | - |
| bellpull | (noun) a handle or cord that is pulled to ring a doorbell or a servant's bell etc. | - |
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| bellyful | (noun) an undesirable overabundance | - |
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| beneficial | (adjective) promoting or enhancing well-being | Synonyms: good |
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| benthal | (adjective) of or relating to or happening on the bottom under a body of water | Synonyms: benthic, benthonic |
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| benzol | (noun) a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds | Synonyms: benzene, benzine |
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| benzyl | (noun) the univalent radical derived from toluene | Synonyms: benzyl group, benzyl radical |
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| bergall | (noun) common in north Atlantic coastal waters of the United States | Synonyms: cunner, Tautogolabrus adspersus |
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| beryl | (noun) the chief source of beryllium; colored transparent varieties are valued as gems | - |
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| bestial | (adjective) resembling a beast; showing lack of human sensibility | Synonyms: beastly, brutal, brute, brutish |
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| bestowal | (noun) the act of conferring an honor or presenting a gift | Synonyms: bestowment, conferment, conferral |
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| (noun) a gift that is bestowed or conferred | Synonyms: bestowment |
| betel | (noun) Asian pepper plant whose leaves are chewed with betel nut (seed of the betel palm) by southeast Asians | Synonyms: betel pepper, Piper betel |
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| (noun) a leaf of a vine from the betel pepper | Synonyms: betel leaf |
| bethel | (noun) a house of worship (especially one for sailors) | - |
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| betrayal | (noun) an act of deliberate betrayal | Synonyms: perfidy, treachery, treason |
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| (noun) the quality of aiding an enemy | - |
| betrothal | (noun) the act of becoming betrothed or engaged | Synonyms: espousal |
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| (noun) a mutual promise to marry | Synonyms: engagement, troth |
| bevel | (noun) a hand tool consisting of two rules that are hinged together so you can draw or measure angles of any size | Synonyms: bevel square |
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| (noun) two surfaces meeting at an angle different from 90 degrees | Synonyms: cant, chamfer |
| (verb) cut a bevel on; shape to a bevel | Synonyms: chamfer |
| bewail | (verb) regret strongly | Synonyms: bemoan, deplore, lament |
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| bezel | (noun) a sloping edge on a cutting tool | - |
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| biannual | (adjective) occurring or payable twice each year | Synonyms: biyearly, half-yearly, semiannual |
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| biaural | (adjective) relating to or having or hearing with two ears | Synonyms: binaural |
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| biaxal | (adjective) having two axes | Synonyms: biaxate, biaxial |
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| biaxial | (adjective) having two axes | Synonyms: biaxal, biaxate |
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