| amadavat | (noun) red Asian weaverbirds often kept as cage birds | Synonyms: avadavat |
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| amativeness | (noun) the arousal of feelings of sexual desire | Synonyms: amorousness, eroticism, erotism, sexiness |
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| ambivalence | (noun) mixed feelings or emotions | Synonyms: ambivalency |
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| ambivalency | (noun) mixed feelings or emotions | Synonyms: ambivalence |
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| ambiversion | (noun) (psychology) a balanced disposition intermediate between extroversion and introversion | - |
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| anchovy | (noun) small herring-like plankton-eating fishes often canned whole or as paste; abundant in tropical waters worldwide | - |
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| (noun) tiny fishes usually canned or salted; used for hors d'oeuvres or as seasoning in sauces | - |
| animadversion | (noun) harsh criticism or disapproval | Synonyms: censure |
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| anniversary | (noun) the date on which an event occurred in some previous year (or the celebration of it) | Synonyms: day of remembrance |
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| anovulant | (noun) a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception | Synonyms: anovulatory drug, birth control pill, contraceptive pill, oral contraceptive, oral contraceptive pill, pill |
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| anovulation | (noun) the absence of ovulation due to immaturity or post-maturity or pregnancy or oral contraceptive pills or dysfunction of the ovary | - |
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| antediluvian | (noun) a very old person | Synonyms: ancient |
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| (noun) any of the early patriarchs who lived prior to the Noachian deluge | Synonyms: antediluvian patriarch |
| anticonvulsant | (noun) a drug used to treat or prevent convulsions (as in epilepsy) | Synonyms: anticonvulsant drug, antiepileptic, antiepileptic drug |
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| antihypertensive | (noun) a drug that reduces high blood pressure | Synonyms: antihypertensive drug |
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| antitussive | (noun) any medicine used to suppress or relieve coughing | - |
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| antivenene | (noun) an antitoxin that counteracts the effects of venom from the bite of a snake or insect or other animal | Synonyms: antivenin |
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| antivenin | (noun) an antitoxin that counteracts the effects of venom from the bite of a snake or insect or other animal | Synonyms: antivenene |
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| antiviral | (noun) any drug that destroys viruses | Synonyms: antiviral agent, antiviral drug |
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| anvil | (noun) a heavy block of iron or steel on which hot metals are shaped by hammering | - |
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| (noun) a small bone in the middle ear between the malleus and the stapes | Synonyms: incus |
| apojove | (noun) apoapsis in orbit around Jupiter | - |
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| appellative | (noun) identifying word or words by which someone or something is called and classified or distinguished from others | Synonyms: appellation, denomination, designation |
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| appreciativeness | (noun) warm friendly feelings of gratitude | Synonyms: gratefulness, thankfulness |
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| apprehensiveness | (noun) fearful expectation or anticipation | Synonyms: apprehension, dread |
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| approval | (noun) the formal act of approving | Synonyms: approving, blessing |
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| (noun) a message expressing a favorable opinion | Synonyms: commendation |
| (noun) a feeling of liking something or someone good | - |
| (noun) acceptance as satisfactory | Synonyms: favorable reception, favourable reception |
| approver | (noun) an authority with power to approve | - |
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| approving | (noun) the formal act of approving | Synonyms: approval, blessing |
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| aquavit | (noun) Scandinavian liquor usually flavored with caraway seeds | Synonyms: akvavit |
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| arborvirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arbovirus |
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| arborvitae | (noun) any of several Asian and North American conifers of the genera Thuja and Thujopsis | - |
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| arbovirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arborvirus |
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| architrave | (noun) the lowest part of an entablature; rests immediately on the capitals of the columns | - |
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| (noun) the molding around a door or window | - |
| archive | (noun) a depository containing historical records and documents | - |
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| archives | (noun) collection of records especially about an institution | - |
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| archivist | (noun) a person in charge of collecting and cataloguing archives | - |
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| arenavirus | (noun) animal viruses belonging to the family Arenaviridae | - |
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| arrival | (noun) accomplishment of an objective | Synonyms: reaching |
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| (noun) the act of arriving at a certain place | - |
| (noun) someone who arrives (or has arrived) | Synonyms: arriver, comer |
| arrivederci | (noun) a farewell remark | Synonyms: adieu, adios, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodby, goodbye, sayonara, so long |
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| arriver | (noun) someone who arrives (or has arrived) | Synonyms: arrival, comer |
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| arriviste | (noun) a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class | Synonyms: nouveau-riche, parvenu, upstart |
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| assertiveness | (noun) aggressive self-assurance; given to making bold assertions | Synonyms: self-assertiveness |
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| asseveration | (noun) a declaration that is made emphatically (as if no supporting evidence were necessary) | Synonyms: assertion, averment |
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| asseverator | (noun) someone who claims to speak the truth | Synonyms: affirmer, asserter, avower, declarer |
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| astronavigation | (noun) navigating according to the positions of the stars | Synonyms: celestial navigation |
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| atavism | (noun) a reappearance of an earlier characteristic | Synonyms: reversion, throwback |
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| atavist | (noun) an organism that has the characteristics of a more primitive type of that organism | Synonyms: throwback |
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| atorvastatin | (noun) an oral drug (trade name Lipitor) that is effective in lowering triglycerides; potent in reducing LDL cholesterol because higher doses can be given | Synonyms: Lipitor |
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| attentiveness | (noun) the trait of being considerate and thoughtful of others | - |
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| (noun) the trait of being observant and paying attention | - |
| (noun) paying particular notice (as to children or helpless people) | Synonyms: heed, paying attention, regard |
| attractiveness | (noun) sexual allure | - |
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| (noun) the quality of arousing interest; being attractive or something that attracts | Synonyms: attraction |
| audiovisual | (noun) materials using sight or sound to present information | Synonyms: audiovisual aid |
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| autoclave | (noun) a device for heating substances above their boiling point; used to manufacture chemicals or to sterilize surgical instruments | Synonyms: steriliser, sterilizer |
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| avadavat | (noun) red Asian weaverbirds often kept as cage birds | Synonyms: amadavat |
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| avail | (noun) a means of serving | Synonyms: help, service |
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| availability | (noun) the quality of being at hand when needed | Synonyms: accessibility, availableness, handiness |
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| availableness | (noun) the quality of being at hand when needed | Synonyms: accessibility, availability, handiness |
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| avalanche | (noun) a slide of large masses of snow and ice and mud down a mountain | - |
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| (noun) a sudden appearance of an overwhelming number of things | - |
| avaram | (noun) evergreen Indian shrub with vivid yellow flowers whose bark is used in tanning; sometimes placed in genus Cassia | Synonyms: Cassia auriculata, Senna auriculata, tanner's cassia |
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| avarice | (noun) reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins) | Synonyms: avaritia, covetousness, greed, rapacity |
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| (noun) extreme greed for material wealth | Synonyms: avariciousness, covetousness, cupidity |
| avariciousness | (noun) extreme greed for material wealth | Synonyms: avarice, covetousness, cupidity |
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| avaritia | (noun) reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins) | Synonyms: avarice, covetousness, greed, rapacity |
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| avatar | (noun) the manifestation of a Hindu deity (especially Vishnu) in human or superhuman or animal form | - |
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| (noun) a new personification of a familiar idea | Synonyms: embodiment, incarnation |
| avenger | (noun) someone who takes vengeance | Synonyms: retaliator |
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| avens | (noun) any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers | - |
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| aventail | (noun) a medieval hood of mail suspended from a basinet to protect the head and neck | Synonyms: camail, ventail |
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| aventurine | (noun) a translucent quartz spangled with bits of mica or other minerals | Synonyms: sunstone |
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| avenue | (noun) a line of approach | - |
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| (noun) a wide street or thoroughfare | Synonyms: boulevard |
| average | (noun) a statistic describing the location of a distribution | Synonyms: norm |
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| (noun) an intermediate scale value regarded as normal or usual | - |
| (noun) (sports) the ratio of successful performances to opportunities | - |
| averageness | (noun) ordinariness as a consequence of being average and not outstanding | Synonyms: mediocrity |
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| (noun) the state of being that is average; indicates normality but with connotations of mediocrity | - |
| averment | (noun) a declaration that is made emphatically (as if no supporting evidence were necessary) | Synonyms: assertion, asseveration |
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| aversion | (noun) the act of turning yourself (or your gaze) away | Synonyms: averting |
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| (noun) a feeling of intense dislike | Synonyms: antipathy, distaste |
| averting | (noun) the act of preventing something from occurring | - |
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| (noun) the act of turning yourself (or your gaze) away | Synonyms: aversion |
| aviary | (noun) a building where birds are kept | Synonyms: bird sanctuary, volary |
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| aviation | (noun) travel via aircraft | Synonyms: air, air travel |
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| (noun) the art of operating aircraft | Synonyms: airmanship |
| (noun) the aggregation of a country's military aircraft | Synonyms: air power |
| (noun) the operation of aircraft to provide transportation | - |
| aviator | (noun) someone who operates an aircraft | Synonyms: aeronaut, flier, flyer |
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| aviatress | (noun) a woman aviator | Synonyms: airwoman, aviatrix |
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| aviatrix | (noun) a woman aviator | Synonyms: airwoman, aviatress |
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| avidity | (noun) a positive feeling of wanting to push ahead with something | Synonyms: avidness, eagerness, keenness |
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| avidness | (noun) a positive feeling of wanting to push ahead with something | Synonyms: avidity, eagerness, keenness |
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| avifauna | (noun) the birds of a particular region or period | - |
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| avionics | (noun) science and technology of electronic systems and devices for aeronautics and astronautics | - |
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| avitaminosis | (noun) any of several diseases caused by deficiency of one or more vitamins | Synonyms: hypovitaminosis |
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| avo | (noun) 100 avos equal 1 pataca in Macao | - |
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| avocado | (noun) a pear-shaped tropical fruit with green or blackish skin and rich yellowish pulp enclosing a single large seed | Synonyms: aguacate, alligator pear, avocado pear |
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| (noun) tropical American tree bearing large pulpy green fruits | Synonyms: avocado tree, Persea Americana |
| avocation | (noun) an auxiliary activity | Synonyms: by-line, hobby, pursuit, sideline, spare-time activity |
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| avocet | (noun) long-legged web-footed black-and-white shorebird with slender upward-curving bill | - |
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| avoidance | (noun) deliberately avoiding; keeping away from or preventing from happening | Synonyms: dodging, shunning, turning away |
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| avoirdupois | (noun) excess bodily weight | Synonyms: blubber, fat, fatness |
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| (noun) a system of weights based on the 16-ounce pound (or 7,000 grains) | Synonyms: avoirdupois weight |
| avouchment | (noun) a statement asserting the existence or the truth of something | Synonyms: affirmation, avowal |
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| avowal | (noun) a statement asserting the existence or the truth of something | Synonyms: affirmation, avouchment |
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| avower | (noun) someone who admits or acknowledges openly and boldly | - |
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| (noun) someone who claims to speak the truth | Synonyms: affirmer, asserter, asseverator, declarer |
| avulsion | (noun) a forcible tearing or surgical separation of one body part from another | - |
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| (noun) an abrupt change in the course of a stream that forms the boundary between two parcels of land resulting in the loss of part of the land of one landowner and a consequent increase in the land of another | - |
| baklava | (noun) rich Middle Eastern cake made of thin layers of flaky pastry filled with nuts and honey | - |
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| balaclava | (noun) a cap that is close-fitting and woolen and covers all of the head but the face | Synonyms: balaclava helmet |
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| basketweaver | (noun) someone skilled in weaving baskets | Synonyms: basketmaker |
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| beaver | (noun) large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges | - |
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| (noun) a hat made with the fur of a beaver (or similar material) | Synonyms: castor |
| (noun) a movable piece of armor on a medieval helmet used to protect the lower face | - |
| (noun) a man's hat with a tall crown; usually covered with silk or with beaver fur | Synonyms: dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper |
| (noun) a full beard | - |
| (noun) the soft brown fur of the beaver | Synonyms: beaver fur |
| bedcover | (noun) decorative cover for a bed | Synonyms: bed cover, bed covering, bedspread, counterpane, spread |
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| bedevilment | (noun) the act of harassing someone | Synonyms: badgering, torment, worrying |
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| beehive | (noun) a man-made receptacle that houses a swarm of bees | Synonyms: hive |
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| (noun) any workplace where people are very busy | - |
| (noun) a hairdo resembling a beehive | - |
| (noun) a structure that provides a natural habitation for bees; as in a hollow tree | Synonyms: hive |
| behavior | (noun) manner of acting or controlling yourself | Synonyms: behaviour, conduct, doings |
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| (noun) (psychology) the aggregate of the responses or reactions or movements made by an organism in any situation | Synonyms: behaviour |
| (noun) (behavioral attributes) the way a person behaves toward other people | Synonyms: behaviour, conduct, demeanor, demeanour, deportment |
| (noun) the action or reaction of something (as a machine or substance) under specified circumstances | Synonyms: behaviour |
| behaviorism | (noun) an approach to psychology that emphasizes observable measurable behavior | Synonyms: behavioristic psychology, behaviourism, behaviouristic psychology |
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| behaviorist | (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviourist |
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| behaviour | (noun) manner of acting or controlling yourself | Synonyms: behavior, conduct, doings |
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| (noun) (psychology) the aggregate of the responses or reactions or movements made by an organism in any situation | Synonyms: behavior |
| (noun) (behavioral attributes) the way a person behaves toward other people | Synonyms: behavior, conduct, demeanor, demeanour, deportment |
| (noun) the action or reaction of something (as a machine or substance) under specified circumstances | Synonyms: behavior |