| abattoir | (noun) a building where animals are butchered | Synonyms: butchery, shambles, slaughterhouse |
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| achira | (noun) canna grown especially for its edible rootstock from which arrowroot starch is obtained | Synonyms: arrowroot, Canna edulis, Canna indica, indian shot |
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| acquirable | (adjective) capable of being acquired | - |
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| acquire | (verb) come to have or undergo a change of (physical features and attributes) | Synonyms: develop, get, grow, produce |
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| (verb) take on a certain form, attribute, or aspect | Synonyms: adopt, assume, take, take on |
| (verb) gain through experience | Synonyms: develop, evolve |
| (verb) gain knowledge or skills | Synonyms: larn, learn |
| (verb) come into the possession of something concrete or abstract | Synonyms: get |
| (verb) win something through one's efforts | Synonyms: gain, win |
| (verb) locate (a moving entity) by means of a tracking system such as radar | - |
| acquired | (adjective) gotten through environmental forces | - |
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| acquirement | (noun) an ability that has been acquired by training | Synonyms: accomplishment, acquisition, attainment, skill |
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| acquirer | (noun) a corporation gaining financial control over another corporation or financial institution through a payment in cash or an exchange of stock | - |
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| (noun) the financial institution that dispenses cash in automated teller machines and collects a fee from the bank that issued the credit card | - |
| (noun) a credit card processing bank; merchants receive credit for credit card receipts less a processing fee | Synonyms: merchant bank |
| (noun) a person who acquires something (usually permanently) | - |
| acquiring | (noun) the act of acquiring something | Synonyms: getting |
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| acyclovir | (noun) an oral antiviral drug (trade name Zovirax) used to treat genital herpes; does not cure the disease but relieves the symptoms | Synonyms: Zovirax |
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| adenovirus | (noun) any of a group of viruses including those that in humans cause upper respiratory infections or infectious pinkeye | - |
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| admirability | (noun) admirable excellence | Synonyms: admirableness, wonderfulness |
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| admirable | (adjective) inspiring admiration or approval | - |
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| (adjective) deserving of esteem and respect | Synonyms: estimable, good, honorable, respectable |
| admirableness | (noun) admirable excellence | Synonyms: admirability, wonderfulness |
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| admirably | (adverb) in an admirable manner | Synonyms: commendable, laudably, praiseworthily |
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| admiral | (noun) any of several brightly colored butterflies | - |
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| (noun) the supreme commander of a fleet; ranks above a vice admiral and below a fleet admiral | Synonyms: full admiral |
| admiralty | (noun) the office of admiral | - |
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| (noun) the department in charge of the navy (as in Great Britain) | - |
| admiration | (noun) a favorable judgment | Synonyms: appreciation |
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| (noun) a feeling of delighted approval and liking | Synonyms: esteem |
| (noun) the feeling aroused by something strange and surprising | Synonyms: wonder, wonderment |
| admire | (verb) feel admiration for | Synonyms: look up to |
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| (verb) look at with admiration | - |
| admired | (adjective) regarded with admiration | - |
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| admirer | (noun) someone who admires a young woman | Synonyms: adorer |
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| (noun) a person who backs a politician or a team etc. | Synonyms: booster, champion, friend, protagonist, supporter |
| (noun) a person who admires; someone who esteems or respects or approves | - |
| admiringly | (adverb) with admiration | - |
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| aegir | (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: bore, eager, eagre, tidal bore |
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| affair | (noun) a vaguely specified concern | Synonyms: matter, thing |
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| (noun) a formal or official social gathering or ceremony of people | Synonyms: function, occasion, social affair, social function, social gathering, social occasion |
| (noun) a usually secretive or illicit sexual relationship | Synonyms: affaire, amour, intimacy, involvement, liaison |
| affaire | (noun) a usually secretive or illicit sexual relationship | Synonyms: affair, amour, intimacy, involvement, liaison |
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| affairs | (noun) transactions of professional or public interest | - |
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| (noun) matters of personal concern | Synonyms: personal business, personal matters |
| affirm | (verb) establish or strengthen as with new evidence or facts | Synonyms: confirm, corroborate, substantiate, support, sustain |
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| (verb) to declare or affirm solemnly and formally as true | Synonyms: assert, aver, avow, swan, swear, verify |
| (verb) say yes to | - |
| affirmable | (adjective) capable of being affirmed or asserted | Synonyms: assertable |
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| affirmation | (noun) a judgment by a higher court that the judgment of a lower court was correct and should stand | - |
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| (noun) a statement asserting the existence or the truth of something | Synonyms: avouchment, avowal |
| (noun) (religion) a solemn declaration that serves the same purpose as an oath (if an oath is objectionable to the person on religious or ethical grounds) | - |
| (noun) the act of affirming or asserting or stating something | Synonyms: assertion, statement |
| affirmative | (adjective) affirming or giving assent | Synonyms: affirmatory |
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| (adjective) expressing or manifesting praise or approval | Synonyms: approbative, approbatory, approving, plausive |
| (adjective) expecting the best | Synonyms: optimistic |
| (noun) a reply of affirmation | - |
| affirmatively | (adverb) in an affirmative manner | - |
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| affirmativeness | (noun) the agreeable quality of one who assents | - |
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| affirmatory | (adjective) affirming or giving assent | Synonyms: affirmative |
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| affirmer | (noun) someone who claims to speak the truth | Synonyms: asserter, asseverator, avower, declarer |
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| afire | (adjective) lighted up by or as by fire or flame | Synonyms: ablaze, aflame, aflare, alight, on fire |
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| afterbirth | (noun) the placenta and fetal membranes that are expelled from the uterus after the baby is born | - |
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| air | (noun) travel via aircraft | Synonyms: air travel, aviation |
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| (noun) a distinctive but intangible quality surrounding a person or thing | Synonyms: atmosphere, aura |
| (noun) a succession of notes forming a distinctive sequence | Synonyms: line, melodic line, melodic phrase, melody, strain, tune |
| (noun) medium for radio and television broadcasting | Synonyms: airwave |
| (noun) the region above the ground | - |
| (noun) the mass of air surrounding the Earth | Synonyms: atmosphere |
| (noun) a slight wind (usually refreshing) | Synonyms: breeze, gentle wind, zephyr |
| (noun) a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of | - |
| (noun) once thought to be one of four elements composing the universe (Empedocles), associated with the humour blood | - |
| (verb) expose to cool or cold air so as to cool or freshen | Synonyms: air out, vent, ventilate |
| (verb) expose to warm or heated air, so as to dry | - |
| (verb) make public | Synonyms: bare, publicise, publicize |
| (verb) broadcast over the airwaves, as in radio or television | Synonyms: beam, broadcast, send, transmit |
| (verb) be broadcast | - |
| (verb) expose to fresh air | Synonyms: aerate, air out |
| airborne | (adjective) moved or conveyed by or through air | - |
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| airbrake | (noun) a vehicular brake that operates by compressed air; especially for heavy vehicles | - |
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| (noun) a small parachute or articulated flap to reduce the speed of an aircraft | Synonyms: dive brake |
| airbrush | (noun) an atomizer to spray paint by means of compressed air | - |
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| (verb) paint with an airbrush | - |
| airburst | (noun) an explosion in the atmosphere | - |
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| airbus | (noun) a subsonic jet airliner operated over short distances | - |
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| aircraft | (noun) a vehicle that can fly | - |
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| aircraftman | (noun) a noncommissioned officer in the British Royal Air Force | Synonyms: aircraftsman |
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| aircraftsman | (noun) a noncommissioned officer in the British Royal Air Force | Synonyms: aircraftman |
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| aircrew | (noun) the crew of an aircraft | Synonyms: air crew |
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| aircrewman | (noun) a member of an aircrew | - |
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| airdock | (noun) a large structure at an airport where aircraft can be stored and maintained | Synonyms: hangar, repair shed |
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| airdrome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: aerodrome, airport, drome |
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| airdrop | (noun) delivery of supplies or equipment or personnel by dropping them by parachute from an aircraft | - |
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| aired | (adjective) open to or abounding in fresh air | Synonyms: airy |
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| airfare | (noun) the fare charged for traveling by airplane | - |
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| airfield | (noun) a place where planes take off and land | Synonyms: field, flying field, landing field |
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| airflow | (noun) the flow of air | Synonyms: air flow, flow of air |
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| airfoil | (noun) a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight | Synonyms: aerofoil, control surface, surface |
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| airforce | (noun) the airborne branch of a country's armed forces | Synonyms: air force |
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| airframe | (noun) the framework and covering of an airplane or rocket (excluding the engines) | - |
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| airfreight | (verb) transport (cargo) by air | Synonyms: air-freight, air-ship |
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| airgun | (noun) a gun that propels a projectile by compressed air | Synonyms: air gun, air rifle |
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| airhead | (noun) a bridgehead seized by airborne troops | - |
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| (noun) a flighty scatterbrained simpleton | - |
| airheaded | (adjective) lacking seriousness; given to frivolity | Synonyms: dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded, silly |
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| airily | (adverb) in a flippant manner | Synonyms: flippantly |
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| airiness | (noun) the property of something weightless and insubstantial | Synonyms: buoyancy |
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| (noun) the property of something spacious and abounding in fresh air | - |
| (noun) lightness in movement or manner | Synonyms: delicacy |
| airing | (noun) the act of supplying fresh air and getting rid of foul air | Synonyms: ventilation |
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| (noun) a short excursion (a walk or ride) in the open air | - |
| (noun) the opening of a subject to widespread discussion and debate | Synonyms: dissemination, public exposure, spreading |
| airless | (adjective) lacking fresh air | Synonyms: close, stuffy, unaired |
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| airlift | (noun) transportation of people or goods by air (especially when other means of access are unavailable) | Synonyms: lift |
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| (verb) fly people or goods to or from places not accessible by other means | Synonyms: lift |
| airlike | (adjective) resembling air or having the form of air | Synonyms: aeriform |
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| airline | (noun) a commercial enterprise that provides scheduled flights for passengers | Synonyms: airline business, airway |
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| (noun) a hose that carries air under pressure | Synonyms: air hose |
| airliner | (noun) a commercial airplane that carries passengers | - |
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| airlock | (noun) a chamber that provides access to space where air is under pressure | Synonyms: air lock |
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| airmail | (noun) a system of conveying mail by aircraft | Synonyms: airpost |
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| (noun) letters and packages that are transported by aircraft | - |
| (verb) send or transport by airmail | - |
| airmailer | (noun) a mailer for airmail | - |
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| airman | (noun) a male who operates an aircraft | - |
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| airmanship | (noun) the art of operating aircraft | Synonyms: aviation |
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| airplane | (noun) an aircraft that has a fixed wing and is powered by propellers or jets | Synonyms: aeroplane, plane |
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| airport | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: aerodrome, airdrome, drome |
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| airpost | (noun) a system of conveying mail by aircraft | Synonyms: airmail |
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| airs | (noun) affected manners intended to impress others | Synonyms: pose |
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| airscrew | (noun) a propeller that rotates to push against air | Synonyms: airplane propeller, prop |
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| airship | (noun) a steerable self-propelled aircraft | Synonyms: dirigible |
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| airsick | (adjective) experiencing motion sickness | Synonyms: air sick, carsick, seasick |
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| airsickness | (noun) motion sickness experienced while traveling by air (especially during turbulence) | Synonyms: air sickness |
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| airspace | (noun) the atmosphere above a nation that is deemed to be under its jurisdiction | - |
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| (noun) the space in the atmosphere immediately above the earth | Synonyms: air space |
| airspeed | (noun) the speed of an aircraft relative to the air in which it is flying | - |
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| airstream | (noun) a relatively well-defined prevailing wind | - |
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| (noun) the flow of air that is driven backwards by an aircraft propeller | Synonyms: backwash, race, slipstream, wash |
| airstrip | (noun) an airfield without normal airport facilities | Synonyms: flight strip, landing strip, strip |
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| airt | (verb) channel into a new direction | Synonyms: redirect |
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| airtight | (adjective) having no weak points | Synonyms: air-tight |
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| (adjective) not allowing air or gas to pass in or out | Synonyms: air-tight, gas-tight |
| airwave | (noun) medium for radio and television broadcasting | Synonyms: air |
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| airway | (noun) a commercial enterprise that provides scheduled flights for passengers | Synonyms: airline, airline business |
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| (noun) a duct that provides ventilation (as in mines) | Synonyms: air duct, air passage |
| (noun) the passages through which air enters and leaves the body | Synonyms: respiratory tract |
| (noun) a designated route followed by airplanes in flying from one airport to another | Synonyms: air lane, flight path, skyway |
| airwoman | (noun) a woman aviator | Synonyms: aviatress, aviatrix |
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| airworthiness | (noun) fitness to fly | - |
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| airworthy | (adjective) (of aircraft) fit to fly | - |
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| airy | (adjective) characterized by lightness and insubstantiality; as impalpable or intangible as air | Synonyms: aerial, aeriform, aery, ethereal |
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| (adjective) having little or no perceptible weight; so light as to resemble air | - |
| (adjective) not practical or realizable; speculative | Synonyms: impractical, Laputan, visionary, windy |
| (adjective) open to or abounding in fresh air | Synonyms: aired |
| alphavirus | (noun) an arbovirus of the family Togaviridae that can cause a variety of encephalitis in horses | - |
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| amir | (noun) an independent ruler or chieftain (especially in Africa or Arabia) | Synonyms: ameer, emeer, emir |
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| andiron | (noun) metal supports for logs in a fireplace | Synonyms: dog-iron, dog, firedog |
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| antbird | (noun) any of various dull-colored South American birds that feeding on ants some following army ant swarms | Synonyms: ant bird |
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| antiaircraft | (adjective) designed for defense from a surface position against air attack | - |
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| (noun) artillery designed to shoot upward at airplanes | Synonyms: ack-ack, ack-ack gun, antiaircraft gun, flack, flak, pom-pom |
| antiperspirant | (noun) an astringent substance applied to the skin to reduce perspiration | - |
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| antiredeposition | (noun) the process of preventing redeposition | - |
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