| attractiveness | (noun) sexual allure | - |
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| (noun) the quality of arousing interest; being attractive or something that attracts | Synonyms: attraction |
| attributive | (adjective) of adjectives; placed before the nouns they modify | Synonyms: prenominal |
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| attributively | (adverb) in an attributive manner | - |
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| audiovisual | (adjective) involving both hearing and seeing (usually relating to teaching aids) | - |
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| (noun) materials using sight or sound to present information | Synonyms: audiovisual aid |
| auditive | (adjective) of or relating to the process of hearing | Synonyms: audile, auditory |
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| augmentative | (adjective) increasing or having the power to increase especially in size or amount or degree | - |
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| (adjective) intensifying by augmentation and enhancement | Synonyms: enhancive |
| auriculoventricular | (adjective) relating to or affecting the atria and ventricles of the heart | Synonyms: atrioventricular |
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| authoritative | (adjective) endowed with authority | Synonyms: authorised, authorized |
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| (adjective) having authority or ascendancy or influence | Synonyms: important |
| (adjective) of recognized authority or excellence | Synonyms: definitive |
| authoritatively | (adverb) in an authoritative and magisterial manner | Synonyms: magisterially |
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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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| (verb) subject to the action of an autoclave | - |
| automotive | (adjective) of or relating to motor vehicles | - |
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| (adjective) containing within itself the means of propulsion or movement | Synonyms: self-propelled, self-propelling |
| 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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| (verb) take advantage of | - |
| (verb) take or use | Synonyms: help |
| (verb) be of use to, be useful to | - |
| availability | (noun) the quality of being at hand when needed | Synonyms: accessibility, availableness, handiness |
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| available | (adjective) obtainable or accessible and ready for use or service | - |
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| (adjective) convenient for use or disposal | Synonyms: usable, useable |
| (adjective) not busy; not otherwise committed | Synonyms: uncommitted |
| 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 | - |
| (verb) gather into a huge mass and roll down a mountain, of snow | Synonyms: roll down |
| 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 |
| avaricious | (adjective) immoderately desirous of acquiring e.g. wealth | Synonyms: covetous, grabby, grasping, greedy, prehensile |
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| avariciously | (adverb) in a greedy manner | Synonyms: covetously, greedily |
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| 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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| avascular | (adjective) without blood vessels | - |
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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 |
| avellan | (adjective) pertaining to filberts or hazelnuts | Synonyms: avellane |
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| avellane | (adjective) pertaining to filberts or hazelnuts | Synonyms: avellan |
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| avenge | (verb) take revenge for a perceived wrong | Synonyms: retaliate, revenge |
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| avenged | (adjective) for which vengeance has been taken | - |
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| 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 |
| aver | (verb) to declare or affirm solemnly and formally as true | Synonyms: affirm, assert, avow, swan, swear, verify |
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| (verb) report or maintain | Synonyms: allege, say |
| average | (adjective) lacking special distinction, rank, or status; commonly encountered | Synonyms: ordinary |
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| (adjective) around the middle of a scale of evaluation | Synonyms: intermediate, medium |
| (adjective) lacking exceptional quality or ability | Synonyms: fair, mediocre, middling |
| (adjective) relating to or constituting the middle value of an ordered set of values (or the average of the middle two in a set with an even number of values) | Synonyms: median |
| (adjective) approximating the statistical norm or average or expected value | Synonyms: mean |
| (adjective) relating to or constituting the most frequent value in a distribution | Synonyms: modal |
| (noun) a statistic describing the location of a distribution | Synonyms: norm |
| (noun) an intermediate scale value regarded as normal or usual | - |
| (noun) (sports) the ratio of successful performances to opportunities | - |
| (verb) compute the average of | Synonyms: average out |
| (verb) achieve or reach on average | - |
| (verb) amount to or come to an average, without loss or gain | Synonyms: average out |
| 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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| averse | (adjective) (usually followed by `to') strongly opposed | Synonyms: antipathetic, antipathetical, indisposed, loath, loth |
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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 |
| aversive | (adjective) tending to repel or dissuade | - |
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| avert | (verb) turn away or aside | Synonyms: turn away |
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| (verb) prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off | Synonyms: avoid, debar, deflect, fend off, forefend, forfend, head off, obviate, stave off, ward off |
| avertable | (adjective) capable of being avoided or warded off | Synonyms: avertible, avoidable, evitable |
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| avertible | (adjective) capable of being avoided or warded off | Synonyms: avertable, avoidable, evitable |
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| 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 |
| avian | (adjective) pertaining to or characteristic of birds | - |
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| avianise | (verb) to modify microorganisms by repeated culture in the developing chick embryo | Synonyms: avianize |
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| avianize | (verb) to modify microorganisms by repeated culture in the developing chick embryo | Synonyms: avianise |
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| aviary | (noun) a building where birds are kept | Synonyms: bird sanctuary, volary |
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| aviate | (verb) operate an airplane | Synonyms: fly, pilot |
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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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| avid | (adjective) (often followed by `for') ardently or excessively desirous | Synonyms: devouring, esurient, greedy |
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| (adjective) marked by active interest and enthusiasm | Synonyms: zealous |
| avidity | (noun) a positive feeling of wanting to push ahead with something | Synonyms: avidness, eagerness, keenness |
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| avidly | (adverb) in an avid manner | - |
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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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| avifaunal | (adjective) of or relating to birds of a particular region or period | Synonyms: avifaunistic |
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| avifaunistic | (adjective) of or relating to birds of a particular region or period | Synonyms: avifaunal |
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| avionic | (adjective) of or relating to avionics | - |
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| avionics | (noun) science and technology of electronic systems and devices for aeronautics and astronautics | - |
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| avirulent | (adjective) not virulent; unable to produce disease | - |
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| avitaminosis | (noun) any of several diseases caused by deficiency of one or more vitamins | Synonyms: hypovitaminosis |
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| avitaminotic | (adjective) of or relating to or characteristic of avitaminosis | - |
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| avo | (noun) 100 avos equal 1 pataca in Macao | - |
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| avocado | (adjective) of the dull yellowish green of the meat of an avocado | - |
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| (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 |
| (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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| avocational | (adjective) of or involved in an avocation | - |
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| avocet | (noun) long-legged web-footed black-and-white shorebird with slender upward-curving bill | - |
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| avoid | (verb) stay clear from; keep away from; keep out of the way of someone or something | - |
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| (verb) refrain from certain foods or beverages | Synonyms: keep off |
| (verb) declare invalid | Synonyms: annul, invalidate, nullify, quash, void |
| (verb) prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off | Synonyms: avert, debar, deflect, fend off, forefend, forfend, head off, obviate, stave off, ward off |
| (verb) refrain from doing something | - |
| avoidable | (adjective) capable of being avoided or warded off | Synonyms: avertable, avertible, evitable |
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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 |
| avouch | (verb) admit openly and bluntly; make no bones about | Synonyms: avow |
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| avouchment | (noun) a statement asserting the existence or the truth of something | Synonyms: affirmation, avowal |
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| avow | (verb) to declare or affirm solemnly and formally as true | Synonyms: affirm, assert, aver, swan, swear, verify |
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| (verb) admit openly and bluntly; make no bones about | Synonyms: avouch |
| avowal | (noun) a statement asserting the existence or the truth of something | Synonyms: affirmation, avouchment |
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| avowed | (adjective) openly declared as such | Synonyms: professed |
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| avowedly | (adverb) by open declaration | Synonyms: professedly |
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| (adverb) as acknowledged | Synonyms: admittedly, confessedly, true |
| 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 |
| avulse | (verb) separate by avulsion | - |
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| 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 | - |
| avuncular | (adjective) being or relating to an uncle | - |
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| (adjective) resembling an uncle in kindness or indulgence | - |
| baccivorous | (adjective) feeding on berries | - |
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| 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 |
| (verb) work hard on something | Synonyms: beaver away |
| bedcover | (noun) decorative cover for a bed | Synonyms: bed cover, bed covering, bedspread, counterpane, spread |
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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 |
| 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 |
| behave | (verb) behave in a certain manner; show a certain behavior; conduct or comport oneself | Synonyms: acquit, act, bear, carry, comport, conduct, deport, do |
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| (verb) behave well or properly | Synonyms: comport |
| 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 |
| behavioral | (adjective) of or relating to behavior | Synonyms: behavioural |
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| behaviorism | (noun) an approach to psychology that emphasizes observable measurable behavior | Synonyms: behavioristic psychology, behaviourism, behaviouristic psychology |
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| behaviorist | (adjective) of or relating to behaviorism | Synonyms: behavioristic, behaviourist, behaviouristic |
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| (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviourist |
| behavioristic | (adjective) of or relating to behaviorism | Synonyms: behaviorist, behaviourist, behaviouristic |
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