| azathioprine | (noun) an immunosuppressive drug (trade name Imuran) used to prevent rejection of a transplanted organ | Synonyms: Imuran |
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| baccalaureate | (noun) an academic degree conferred on someone who has successfully completed undergraduate studies | Synonyms: bachelor's degree |
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| (noun) a farewell sermon to a graduating class at their commencement ceremonies | - |
| baccarat | (noun) a card game played in casinos in which two or more punters gamble against the banker; the player wins who holds 2 or 3 cards that total closest to nine | Synonyms: chemin de fer |
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| backbeat | (noun) a loud steady beat | - |
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| backchat | (noun) light teasing repartee | Synonyms: banter, give-and-take, raillery |
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| backplate | (noun) plate armor protecting the back; worn as part of a cuirass | - |
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| backscratcher | (noun) a long-handled scratcher for scratching your back | - |
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| (noun) someone who is willing to trade favors or services for mutual advantage | - |
| backseat | (noun) a seat at the back of a vehicle (especially the seat at the back of an automobile) | - |
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| (noun) a secondary or inferior position or status | - |
| backwardation | (noun) the market condition wherein the price of a forward or futures contract is trading below the expected spot price at contract maturity. | - |
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| backwater | (noun) a place or condition in which no development or progress is occurring | - |
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| (noun) a body of water that was created by a flood or tide or by being held or forced back by a dam | - |
| bacteriostat | (noun) a chemical or biological material that inhibits bacterial growth | - |
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| bagatelle | (noun) a table game in which short cues are used to knock balls into holes that are guarded by wooden pegs; penalties are incurred if the pegs are knocked over | Synonyms: bar billiards |
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| (noun) something of little value or significance | Synonyms: fluff, frippery, frivolity |
| (noun) a light piece of music for piano | - |
| balata | (noun) a tropical hardwood tree yielding balata gum and heavy red timber | Synonyms: balata tree, beefwood, bully tree, Manilkara bidentata |
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| (noun) when dried yields a hard substance used e.g. in golf balls | Synonyms: gutta balata |
| baldpate | (noun) a widgeon the male of which has a white crown | Synonyms: American widgeon, Anas americana |
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| (noun) a person whose head is bald or shaved | Synonyms: baldhead, baldy, skin, skinhead |
| barbarisation | (noun) an act that makes people primitive and uncivilized | Synonyms: barbarization |
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| barbarization | (noun) an act that makes people primitive and uncivilized | Synonyms: barbarisation |
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| barbiturate | (noun) organic compound having powerful soporific effect; overdose can be fatal | - |
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| bardolatry | (noun) the idolization of William Shakespeare | - |
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| bareboat | (noun) a vessel (such as a yacht) that can be chartered without a captain or crew or provisions | - |
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| bareboating | (noun) boating by chartering a bareboat and providing your own crew and provisions | - |
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| barrater | (noun) someone guilty of barratry | Synonyms: barrator |
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| barrator | (noun) someone guilty of barratry | Synonyms: barrater |
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| barratry | (noun) the offense of vexatiously persisting in inciting lawsuits and quarrels | - |
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| (noun) (maritime law) a fraudulent breach of duty by the master of a ship that injures the owner of the ship or its cargo; includes every breach of trust such as stealing or sinking or deserting the ship or embezzling the cargo | - |
| (noun) the crime of a judge whose judgment is influenced by bribery | - |
| (noun) traffic in ecclesiastical offices or preferments | Synonyms: simony |
| bastardisation | (noun) an act that debases or corrupts | Synonyms: bastardization |
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| bastardization | (noun) an act that debases or corrupts | Synonyms: bastardisation |
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| (noun) declaring or rendering bastard | - |
| bat | (noun) (baseball) a turn trying to get a hit | Synonyms: at-bat |
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| (noun) nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate | Synonyms: chiropteran |
| (noun) a club used for hitting a ball in various games | - |
| (noun) the club used in playing cricket | Synonyms: cricket bat |
| (noun) a small racket with a long handle used for playing squash | Synonyms: squash racket, squash racquet |
| batch | (noun) a collection of things or persons to be handled together | Synonyms: clutch |
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| (noun) all the loaves of bread baked at the same time | - |
| (noun) (often followed by `of') a large number or amount or extent | Synonyms: deal, flock, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, mountain, muckle, passel, peck, pile, plenty, pot, quite a little, raft, sight, slew, spate, stack, tidy sum, wad |
| batfish | (noun) bottom-dweller of warm western Atlantic coastal waters having a flattened scaleless body that crawls about on fleshy pectoral and pelvic fins | - |
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| bath | (noun) a soaking and washing in a bathtub | - |
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| (noun) a vessel containing liquid in which something is immersed (as to process it or to maintain it at a constant temperature or to lubricate it) | - |
| (noun) an ancient Hebrew liquid measure equal to about 10 gallons | - |
| bathe | (noun) the act of swimming for pleasure or recreation | - |
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| bather | (noun) a person who travels through the water by swimming | Synonyms: natator, swimmer |
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| (noun) a person who takes a bath | - |
| bathhouse | (noun) a building containing public baths | Synonyms: bagnio |
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| (noun) a building containing dressing rooms for bathers | Synonyms: bathing machine |
| bathing | (noun) immersing the body in water or sunshine | - |
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| (noun) the act of washing yourself (or another person) | Synonyms: washup |
| batholite | (noun) large mass of intrusive igneous rock believed to have solidified deep within the earth | Synonyms: batholith, pluton, plutonic rock |
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| batholith | (noun) large mass of intrusive igneous rock believed to have solidified deep within the earth | Synonyms: batholite, pluton, plutonic rock |
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| bathometer | (noun) an instrument that measures the depth of water | Synonyms: bathymeter |
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| bathos | (noun) triteness or triviality of style | - |
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| (noun) a change from a serious subject to a disappointing one | Synonyms: anticlimax |
| (noun) insincere pathos | Synonyms: mawkishness |
| bathrobe | (noun) a loose-fitting robe of towelling; worn after a bath or swim | - |
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| bathroom | (noun) a room (as in a residence) containing a bathtub or shower and usually a washbasin and toilet | - |
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| (noun) a room or building equipped with one or more toilets | Synonyms: can, john, lav, lavatory, privy, toilet |
| bathtub | (noun) a relatively large open container that you fill with water and use to wash the body | Synonyms: bathing tub, tub |
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| bathymeter | (noun) an instrument that measures the depth of water | Synonyms: bathometer |
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| bathymetry | (noun) measuring the depths of the oceans | Synonyms: plumbing |
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| bathyscape | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscaph, bathyscaphe |
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| bathyscaph | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscape, bathyscaphe |
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| bathyscaphe | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscape, bathyscaph |
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| bathysphere | (noun) spherical deep diving apparatus (lowered by a cable) for underwater exploration | - |
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| batik | (noun) a dyed fabric; a removable wax is used where the dye is not wanted | - |
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| batiste | (noun) a thin plain-weave cotton or linen fabric; used for shirts or dresses | - |
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| batman | (noun) an orderly assigned to serve a British military officer | - |
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| baton | (noun) a thin tapered rod used by a conductor to lead an orchestra or choir | Synonyms: wand |
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| (noun) a hollow cylinder passed from runner to runner in a relay race | - |
| (noun) a hollow metal rod that is wielded or twirled by a drum major or drum majorette | - |
| (noun) a short staff carried by some officials to symbolize an office or an authority | - |
| (noun) a short stout club used primarily by policemen | Synonyms: billy, billy club, billystick, nightstick, truncheon |
| batrachian | (noun) any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species | Synonyms: anuran, frog, salientian, toad, toad frog |
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| batrachomyomachia | (noun) a silly altercation | - |
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| batsman | (noun) (baseball) a ballplayer who is batting | Synonyms: batter, hitter, slugger |
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| battalion | (noun) an army unit usually consisting of a headquarters and three or more companies | - |
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| (noun) a large indefinite quantity | Synonyms: large number, multitude, pack, plurality |
| batten | (noun) a strip fixed to something to hold it firm | - |
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| (noun) stuffing made of rolls or sheets of cotton wool or synthetic fiber | Synonyms: batting |
| batter | (noun) a liquid or semiliquid mixture, as of flour, eggs, and milk, used in cooking | - |
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| (noun) (baseball) a ballplayer who is batting | Synonyms: batsman, hitter, slugger |
| battercake | (noun) a flat cake of thin batter fried on both sides on a griddle | Synonyms: flannel-cake, flannel cake, flapcake, flapjack, griddlecake, hot cake, hotcake, pancake |
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| battering | (noun) the act of subjecting to strong attack | Synonyms: banging |
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| battery | (noun) an assault in which the assailant makes physical contact | Synonyms: assault and battery |
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| (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage, barrage fire, bombardment, shelling |
| (noun) a device that produces electricity; may have several primary or secondary cells arranged in parallel or series | Synonyms: electric battery |
| (noun) a series of stamps operated in one mortar for crushing ores | Synonyms: stamp battery |
| (noun) a collection of related things intended for use together | - |
| (noun) group of guns or missile launchers operated together at one place | - |
| (noun) a unit composed of the pitcher and catcher | - |
| batting | (noun) (baseball) the batter's attempt to get on base | - |
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| (noun) stuffing made of rolls or sheets of cotton wool or synthetic fiber | Synonyms: batten |
| battle | (noun) a hostile meeting of opposing military forces in the course of a war | Synonyms: conflict, engagement, fight |
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| (noun) an energetic attempt to achieve something | Synonyms: struggle |
| (noun) an open clash between two opposing groups (or individuals) | Synonyms: conflict, struggle |
| battledore | (noun) an ancient racket game | Synonyms: battledore and shuttlecock |
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| (noun) a light long-handled racket used by badminton players | Synonyms: badminton racket, badminton racquet |
| battlefield | (noun) a region where a battle is being (or has been) fought | Synonyms: battleground, field, field of battle, field of honor |
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| battlefront | (noun) the line along which opposing armies face each other | Synonyms: front, front line |
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| battleground | (noun) a region where a battle is being (or has been) fought | Synonyms: battlefield, field, field of battle, field of honor |
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| battlement | (noun) a rampart built around the top of a castle with regular gaps for firing arrows or guns | Synonyms: crenelation, crenellation |
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| battler | (noun) someone who fights (or is fighting) | Synonyms: belligerent, combatant, fighter, scrapper |
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| battleship | (noun) large and heavily armoured warship | Synonyms: battlewagon |
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| battlesight | (noun) an arrangement of sights that makes possible the rapid aiming of a firearm at short ranges | Synonyms: battle sight |
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| battlewagon | (noun) large and heavily armoured warship | Synonyms: battleship |
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| battue | (noun) a hunt in which beaters force the game to flee in the direction of the hunter | - |
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| (noun) indiscriminate slaughter | Synonyms: bloodbath, bloodletting, bloodshed |
| batwing | (noun) one of a pair of swinging doors (as at the entrance to a western saloon) | - |
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| bayat | (noun) an oath of allegiance to an emir | - |
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| bearcat | (noun) arboreal civet of Asia having a long prehensile tail and shaggy black hair | Synonyms: Arctictis bintourong, binturong |
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| beat | (noun) the act of beating to windward; sailing as close as possible to the direction from which the wind is blowing | - |
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| (noun) a stroke or blow | - |
| (noun) a regular rate of repetition | - |
| (noun) the basic rhythmic unit in a piece of music | Synonyms: musical rhythm, rhythm |
| (noun) (prosody) the accent in a metrical foot of verse | Synonyms: cadence, measure, meter, metre |
| (noun) the rhythmic contraction and expansion of the arteries with each beat of the heart | Synonyms: heartbeat, pulsation, pulse |
| (noun) the sound of stroke or blow | - |
| (noun) a regular route for a sentry or policeman | Synonyms: round |
| (noun) a member of the beat generation; a nonconformist in dress and behavior | Synonyms: beatnik |
| (noun) a single pulsation of an oscillation produced by adding two waves of different frequencies; has a frequency equal to the difference between the two oscillations | - |
| beater | (noun) an implement for beating | - |
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| (noun) a worker who rouses wild game from under cover for a hunter | - |
| beatification | (noun) (Roman Catholic Church) an act of the Pope who declares that a deceased person lived a holy life and is worthy of public veneration; a first step toward canonization | - |
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| (noun) the action of rendering supremely blessed and extremely happy | - |
| (noun) a state of supreme happiness | Synonyms: beatitude, blessedness |
| beating | (noun) the act of inflicting corporal punishment with repeated blows | Synonyms: drubbing, lacing, licking, thrashing, trouncing, whacking |
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| (noun) the act of overcoming or outdoing | Synonyms: whipping |
| beatitude | (noun) a state of supreme happiness | Synonyms: beatification, blessedness |
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| beatnik | (noun) a member of the beat generation; a nonconformist in dress and behavior | Synonyms: beat |
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| beatniks | (noun) a United States youth subculture of the 1950s; rejected possessions or regular work or traditional dress; for communal living and psychedelic drugs and anarchism; favored modern forms of jazz (e.g., bebop) | Synonyms: beat generation, beats |
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| beats | (noun) a United States youth subculture of the 1950s; rejected possessions or regular work or traditional dress; for communal living and psychedelic drugs and anarchism; favored modern forms of jazz (e.g., bebop) | Synonyms: beat generation, beatniks |
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| beautification | (noun) the act of making something more beautiful | - |
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| bedmate | (noun) a person with whom you share a bed | Synonyms: bedfellow |
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| beefeater | (noun) officer in the (ceremonial) bodyguard of the British monarch | Synonyms: yeoman, yeoman of the guard |
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| beneficiation | (noun) crushing and separating ore into valuable substances or waste by any of a variety of techniques | Synonyms: mineral dressing, mineral extraction, mineral processing, ore dressing, ore processing |
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| benzoate | (noun) any salt or ester of benzoic acid | - |
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| berating | (noun) a severe rebuke | Synonyms: blowing up |
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| betatron | (noun) accelerates a continuous beam of electrons to high speeds by means of the electric field produced by changing magnetic flux | Synonyms: induction accelerator |
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| bevatron | (noun) a cyclotron that accelerates protons up to several billion electron volts | - |
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| bibliolatry | (noun) the worship of the Bible | Synonyms: Bible-worship |
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| bicarbonate | (noun) a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate | Synonyms: hydrogen carbonate |
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| bichromate | (noun) a salt of the hypothetical dichromic acid | Synonyms: dichromate |
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| bifurcation | (noun) the act of splitting into two branches | - |
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| (noun) the place where something divides into two branches | - |
| (noun) a bifurcating branch (one or both of them) | - |
| 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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| bilgewater | (noun) pretentious or silly talk or writing | Synonyms: baloney, boloney, bosh, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
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| billingsgate | (noun) foul-mouthed or obscene abuse | Synonyms: scurrility |
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| bilocation | (noun) the ability (said of certain Roman Catholic saints) to exist simultaneously in two locations | - |
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| bioattack | (noun) the use of bacteria or viruses or toxins to destroy men and animals or food | Synonyms: biologic attack, biological attack, biological warfare, BW |
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