| ablative | (noun) the case indicating the agent in passive sentences or the instrument or manner or place of the action described by the verb | Synonyms: ablative case |
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| abrasive | (noun) a substance that abrades or wears down | Synonyms: abradant, abrasive material |
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| abrasiveness | (noun) the roughness of a substance that causes abrasions | Synonyms: harshness, scratchiness |
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| (noun) the quality of being sharply disagreeable | - |
| absorptivity | (noun) (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body | Synonyms: absorption factor |
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| acclivity | (noun) an upward slope or grade (as in a road) | Synonyms: ascent, climb, raise, rise, upgrade |
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| accusative | (noun) the case of nouns serving as the direct object of a verb | Synonyms: accusative case, objective case |
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| acquisitiveness | (noun) strong desire to acquire and possess | - |
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| activating | (noun) the activity of causing to have energy and be active | Synonyms: activation, energizing |
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| activation | (noun) the activity of causing to have energy and be active | Synonyms: activating, energizing |
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| (noun) making active and effective (as a bomb) | - |
| (noun) stimulation of activity in an organism or chemical | - |
| activator | (noun) (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription | - |
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| active | (noun) a person who is a participating member of an organization | - |
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| (noun) the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb | Synonyms: active voice |
| (noun) chemical agent capable of activity | Synonyms: active agent |
| activeness | (noun) the trait of being active; moving or acting rapidly and energetically | Synonyms: activity |
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| (noun) the state of being active | Synonyms: action, activity |
| activewear | (noun) attire worn for sport or for casual wear | Synonyms: athletic wear, sportswear |
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| activism | (noun) a policy of taking direct action to achieve a political or social goal | - |
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| activist | (noun) a militant reformer | Synonyms: militant |
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| activity | (noun) any specific behavior | - |
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| (noun) the trait of being active; moving or acting rapidly and energetically | Synonyms: activeness |
| (noun) an organic process that takes place in the body | Synonyms: bodily function, bodily process, body process |
| (noun) a process existing in or produced by nature (rather than by the intent of human beings) | Synonyms: action, natural action, natural process |
| (noun) the state of being active | Synonyms: action, activeness |
| (noun) (chemistry) the capacity of a substance to take part in a chemical reaction | - |
| additive | (noun) something added to enhance food or gasoline or paint or medicine | - |
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| adhesive | (noun) a substance that unites or bonds surfaces together | Synonyms: adhesive agent, adhesive material |
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| adhesiveness | (noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | Synonyms: adherence, adhesion, bond |
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| adjective | (noun) a word that expresses an attribute of something | - |
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| (noun) the word class that qualifies nouns | - |
| administrivia | (noun) the tiresome but essential details that must be taken care of and tasks that must be performed in running an organization | - |
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| aestivation | (noun) (botany) the arrangement of sepals and petals in a flower bud before it opens | Synonyms: estivation |
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| (noun) (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period | Synonyms: estivation |
| affirmative | (noun) a reply of affirmation | - |
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| affirmativeness | (noun) the agreeable quality of one who assents | - |
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| affricative | (noun) a composite speech sound consisting of a stop and a fricative articulated at the same point (as `ch' in `chair' and `j' in `joy') | Synonyms: affricate, affricate consonant |
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| aggressiveness | (noun) the quality of being bold and enterprising | - |
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| (noun) a natural disposition to be hostile | Synonyms: belligerence, pugnacity |
| (noun) a feeling of hostility that arouses thoughts of attack | Synonyms: aggression |
| aliveness | (noun) the property of being animated; having animal life as distinguished from plant life | Synonyms: animateness, liveness |
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| (noun) the condition of living or the state of being alive | Synonyms: animation, life, living |
| allusiveness | (noun) a quality characterized by indirect reference | - |
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| almsgiver | (noun) a person who gives alms | - |
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| almsgiving | (noun) making voluntary contributions to aid the poor | Synonyms: alms-giving |
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| alternative | (noun) one of a number of things from which only one can be chosen | Synonyms: choice, option |
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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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| 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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| 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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| 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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| 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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| 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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| 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 |
| 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 |
| biodiversity | (noun) the diversity of plant and animal life in a particular habitat (or in the world as a whole) | - |
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| bivalve | (noun) marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together | Synonyms: lamellibranch, pelecypod |
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| bivouac | (noun) temporary living quarters specially built by the army for soldiers | Synonyms: camp, cantonment, encampment |
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| (noun) a site where people on holiday can pitch a tent | Synonyms: campground, camping area, camping ground, camping site, campsite, encampment |
| bivouacking | (noun) the act of encamping and living in tents in a camp | Synonyms: camping, encampment, tenting |
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| bolivar | (noun) the basic unit of money in Venezuela; equal to 100 centimos | - |
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| bolivia | (noun) a form of canasta in which sequences can be melded | - |
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| boliviano | (noun) the basic unit of money in Bolivia; equal to 100 centavos | - |
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| cabdriver | (noun) someone who drives a taxi for a living | Synonyms: cabby, cabman, hack-driver, hack driver, livery driver, taxidriver, taximan |
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| captivation | (noun) a feeling of great liking for something wonderful and unusual | Synonyms: enchantment, enthrallment, fascination |
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| (noun) the state of being intensely interested (as by awe or terror) | Synonyms: fascination |
| captive | (noun) an animal that is confined | - |
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| (noun) a person who is confined; especially a prisoner of war | Synonyms: prisoner |
| (noun) a person held in the grip of a strong emotion or passion | - |
| captivity | (noun) the state of being a slave | Synonyms: enslavement |
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| (noun) the state of being imprisoned | Synonyms: immurement, imprisonment, incarceration |
| caregiver | (noun) a person who is responsible for attending to the needs of a child or dependent adult | - |
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| (noun) a person who helps in identifying or preventing or treating illness or disability | Synonyms: health care provider, health professional, PCP, primary care provider |
| carminative | (noun) medication that prevents the formation of gas in the alimentary tract or eases its passing | - |
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| carnival | (noun) a festival marked by merrymaking and processions | - |
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| (noun) a traveling show; having sideshows and rides and games of skill etc. | Synonyms: fair, funfair |
| (noun) a frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment | Synonyms: circus |
| carnivore | (noun) a terrestrial or aquatic flesh-eating mammal | - |
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| (noun) any animal that feeds on flesh | - |
| carnivorousness | (noun) The quality of being an animal that eats meat as the main part of its diet. | Synonyms: zoophagy |
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| cerivastatin | (noun) an oral drug (trade name Baycol) to reduce blood cholesterol levels | Synonyms: Baycol |
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| charivari | (noun) a noisy mock serenade (made by banging pans and kettles) to a newly married couple | Synonyms: belling, callathump, callithump, chivaree, shivaree |
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| chivalry | (noun) courtesy towards women | Synonyms: gallantry, politesse |
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| (noun) the medieval principles governing knighthood and knightly conduct | Synonyms: knightliness |
| chivaree | (noun) a noisy mock serenade (made by banging pans and kettles) to a newly married couple | Synonyms: belling, callathump, callithump, charivari, shivaree |
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| chive | (noun) perennial having hollow cylindrical leaves used for seasoning | Synonyms: Allium schoenoprasum, chives, cive, schnittlaugh |
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| chives | (noun) cylindrical leaves used fresh as a mild onion-flavored seasoning | - |
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| (noun) perennial having hollow cylindrical leaves used for seasoning | Synonyms: Allium schoenoprasum, chive, cive, schnittlaugh |
| cive | (noun) perennial having hollow cylindrical leaves used for seasoning | Synonyms: Allium schoenoprasum, chive, chives, schnittlaugh |
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| civet | (noun) cat-like mammal typically secreting musk used in perfumes | Synonyms: civet cat |
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| civics | (noun) the social science of civic affairs | - |
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| civies | (noun) civilian garb as opposed to a military uniform | Synonyms: civvies |
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| civilian | (noun) a nonmilitary citizen | - |
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| civilisation | (noun) the quality of excellence in thought and manners and taste | Synonyms: civilization, refinement |
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| (noun) a society in an advanced state of social development (e.g., with complex legal and political and religious organizations) | Synonyms: civilization |
| (noun) a particular society at a particular time and place | Synonyms: civilization, culture |
| (noun) the social process whereby societies achieve an advanced stage of development and organization | Synonyms: civilization |
| civility | (noun) the act of showing regard for others | Synonyms: politeness |
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| (noun) formal or perfunctory politeness | - |
| civilization | (noun) the quality of excellence in thought and manners and taste | Synonyms: civilisation, refinement |
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| (noun) a society in an advanced state of social development (e.g., with complex legal and political and religious organizations) | Synonyms: civilisation |
| (noun) a particular society at a particular time and place | Synonyms: civilisation, culture |
| (noun) the social process whereby societies achieve an advanced stage of development and organization | Synonyms: civilisation |
| civvies | (noun) civilian garb as opposed to a military uniform | Synonyms: civies |
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| clivers | (noun) annual having the stem beset with curved prickles; North America and Europe and Asia | Synonyms: catchweed, cleavers, Galium aparine, goose grass, spring cleavers |
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| cohesiveness | (noun) the property of being cohesive and sticky | Synonyms: glueyness, gluiness, gumminess, ropiness, tackiness, viscidity, viscidness |
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| (noun) the state of cohering or sticking together | Synonyms: coherence, coherency, cohesion |
| collective | (noun) members of a cooperative enterprise | - |
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| collectivisation | (noun) the organization of a nation or economy on the basis of collectivism | Synonyms: collectivization |
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| collectivism | (noun) a political theory that the people should own the means of production | - |
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| (noun) Soviet communism | Synonyms: Bolshevism, sovietism |
| collectivist | (noun) a person who belongs to the political left | Synonyms: left-winger, leftist |
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| collectivization | (noun) the organization of a nation or economy on the basis of collectivism | Synonyms: collectivisation |
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| combativeness | (noun) a militant aggressiveness | Synonyms: militance, militancy |
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| commemorative | (noun) an object (such as a coin or postage stamp) made to mark an event or honor a person | - |
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| communicativeness | (noun) the trait of being communicative | - |
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| comparative | (noun) the comparative form of an adjective or adverb | Synonyms: comparative degree |
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| competitiveness | (noun) an aggressive willingness to compete | Synonyms: fight |
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| comprehensive | (noun) an intensive examination testing a student's proficiency in some special field of knowledge | Synonyms: comp, comprehensive examination |
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| comprehensiveness | (noun) the capacity to understand a broad range of topics | Synonyms: breadth, largeness |
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| (noun) completeness over a broad scope | Synonyms: fullness |