| abatement | (noun) the act of abating | - |
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| (noun) an interruption in the intensity or amount of something | Synonyms: hiatus, reprieve, respite, suspension |
| abatis | (noun) a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy | Synonyms: abattis |
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| abator | (noun) a person who abates a nuisance | - |
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| abattis | (noun) a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy | Synonyms: abatis |
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| abattoir | (noun) a building where animals are butchered | Synonyms: butchery, shambles, slaughterhouse |
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| absorbate | (noun) a material that has been or is capable of being absorbed | - |
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| acrobat | (noun) an athlete who performs acts requiring skill and agility and coordination | - |
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| acrobatics | (noun) the gymnastic moves of an acrobat | Synonyms: tumbling |
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| (noun) the performance of stunts while in flight in an aircraft | Synonyms: aerobatics, stunt flying, stunting |
| adiabaticity | (noun) The condition of occurring without gain or loss of heat (and thus with no change in entropy, in the quasistatic approximation). | - |
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| adsorbate | (noun) a material that has been or is capable of being adsorbed | - |
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| aerobatics | (noun) the performance of stunts while in flight in an aircraft | Synonyms: acrobatics, stunt flying, stunting |
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| albatross | (noun) large web-footed birds of the Southern Hemisphere having long narrow wings; noted for powerful gliding flight | Synonyms: mollymawk |
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| (noun) (figurative) something that hinders or handicaps | Synonyms: millstone |
| approbation | (noun) official recognition or approval | - |
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| (noun) official approval | - |
| 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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| birdbath | (noun) an ornamental basin (usually in a garden) for birds to bathe in | - |
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| bloodbath | (noun) indiscriminate slaughter | Synonyms: battue, bloodletting, bloodshed |
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| brickbat | (noun) blunt criticism | - |
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| (noun) a fragment of brick used as a weapon | - |
| bullbat | (noun) mainly nocturnal North American goatsucker | Synonyms: mosquito hawk, nighthawk |
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| celibate | (noun) an unmarried person who has taken a religious vow of chastity | - |
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| combat | (noun) an engagement fought between two military forces | Synonyms: armed combat |
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| (noun) the act of fighting; any contest or struggle | Synonyms: fight, fighting, scrap |
| combatant | (noun) someone who fights (or is fighting) | Synonyms: battler, belligerent, fighter, scrapper |
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| combativeness | (noun) a militant aggressiveness | Synonyms: militance, militancy |
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| conglobation | (noun) an occurrence combining miscellaneous things into a (more or less) rounded mass | Synonyms: conglomeration |
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| (noun) a rounded spherical form | Synonyms: conglomeration |
| conurbation | (noun) an aggregation or continuous network of urban communities | Synonyms: sprawl, urban sprawl |
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| debate | (noun) the formal presentation of a stated proposition and the opposition to it (usually followed by a vote) | Synonyms: disputation, public debate |
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| (noun) a discussion in which reasons are advanced for and against some proposition or proposal | Synonyms: argument, argumentation |
| debater | (noun) someone who engages in debate | Synonyms: arguer |
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| dingbat | (noun) a silly empty-headed person | - |
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| disapprobation | (noun) an expression of strong disapproval; pronouncing as wrong or morally culpable | Synonyms: condemnation |
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| exacerbation | (noun) violent and bitter exasperation | - |
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| (noun) action that makes a problem or a disease (or its symptoms) worse | Synonyms: aggravation |
| eyebath | (noun) a small vessel with a rim curved to fit the orbit of the eye; use to apply medicated or cleansing solution to the eyeball | Synonyms: eye cup, eyecup |
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| footbath | (noun) a small bathtub for warming or washing or disinfecting the feet | - |
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| hyperbaton | (noun) reversal of normal word order (as in `cheese I love') | - |
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| incubation | (noun) maintaining something at the most favorable temperature for its development | - |
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| (noun) sitting on eggs so as to hatch them by the warmth of the body | Synonyms: brooding |
| (noun) (pathology) the phase in the development of an infection between the time a pathogen enters the body and the time the first symptoms appear | - |
| incubator | (noun) apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants | Synonyms: brooder |
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| 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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| libation | (noun) the act of pouring a liquid offering (especially wine) as a religious ceremony | - |
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| (noun) a serving (of wine) poured out in honor of a deity | - |
| (noun) (facetious) a serving of an alcoholic beverage | - |
| masturbation | (noun) manual stimulation of the genital organs (of yourself or another) for sexual pleasure | Synonyms: onanism |
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| masturbator | (noun) a person who practices masturbation | Synonyms: onanist |
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| megabat | (noun) large Old World bat of warm and tropical regions that feeds on fruit | Synonyms: fruit bat |
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| microbat | (noun) typically having large ears and feeding primarily on insects; worldwide in distribution | Synonyms: carnivorous bat |
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| noncombatant | (noun) a member of the armed forces who does not participate in combat (e.g. a chaplain or surgeon) | - |
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| numbat | (noun) small Australian marsupial having long snout and strong claws for feeding on termites; nearly extinct | Synonyms: anteater, banded anteater, Myrmecobius fasciatus |
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| perturbation | (noun) the act of causing disorder | Synonyms: disruption |
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| (noun) a disposition that is confused or nervous and upset | Synonyms: fluster |
| (noun) activity that is a malfunction, intrusion, or interruption | Synonyms: disturbance |
| (noun) (physics) a secondary influence on a system that causes it to deviate slightly | - |
| (noun) an unhappy and worried mental state | Synonyms: disturbance, upset |
| probate | (noun) the act of proving that an instrument purporting to be a will was signed and executed in accord with legal requirements | - |
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| (noun) a judicial certificate saying that a will is genuine and conferring on the executors the power to administer the estate | Synonyms: probate will |
| probation | (noun) (law) a way of dealing with offenders without imprisoning them; a defendant found guilty of a crime is released by the court without imprisonment subject to conditions imposed by the court | - |
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| (noun) a trial period during which an offender has time to redeem himself or herself | - |
| (noun) a trial period during which your character and abilities are tested to see whether you are suitable for work or for membership | - |
| probationer | (noun) someone released on probation or on parole | Synonyms: parolee |
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| (noun) a nurse in training who is undergoing a trial period | Synonyms: student nurse |
| rabato | (noun) a wired or starched collar of intricate lace; worn in 17th century | Synonyms: rebato |
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| rebate | (noun) a rectangular groove made to hold two pieces together | Synonyms: rabbet |
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| (noun) a refund of some fraction of the amount paid | Synonyms: discount |
| rebato | (noun) a wired or starched collar of intricate lace; worn in 17th century | Synonyms: rabato |
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| reprobate | (noun) a person without moral scruples | Synonyms: miscreant |
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| reprobation | (noun) severe disapproval | - |
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| (noun) rejection by God; the state of being condemned to eternal misery in Hell | - |
| rubato | (noun) a flexible tempo; not strictly on the beat | - |
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| sabaton | (noun) armor plate that protects the foot; consists of mail with a solid toe and heel | Synonyms: solleret |
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| sabbat | (noun) a midnight meeting of witches to practice witchcraft and sorcery; in the Middle Ages it was supposed to be a demonic orgy | Synonyms: witches' Sabbath |
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