| adherence | (noun) faithful support for a cause or political party or religion | Synonyms: adhesion, attachment |
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| (noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | Synonyms: adhesion, adhesiveness, bond |
| adherent | (noun) someone who believes and helps to spread the doctrine of another | Synonyms: disciple |
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| adhocracy | (noun) an organization with little or no structure | - |
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| adiaphoron | (noun) (Stoic philosophy) a matter having no moral merit or demerit. | - |
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| (noun) a religious ceremonial or ritual observance that is held to be an affair of the individual conscience because it is neither forbidden nor enjoined by the scriptures. | - |
| adjournment | (noun) the termination of a meeting | Synonyms: dissolution |
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| (noun) the act of postponing to another time or place | - |
| adjudicator | (noun) a person who studies and settles conflicts and disputes | - |
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| adjuration | (noun) a solemn and earnest appeal to someone to do something | - |
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| adjuster | (noun) one who investigates insurance claims or claims for damages and recommends an effective settlement | Synonyms: adjustor, claim agent, claims adjuster, claims adjustor |
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| adjustor | (noun) one who investigates insurance claims or claims for damages and recommends an effective settlement | Synonyms: adjuster, claim agent, claims adjuster, claims adjustor |
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| administration | (noun) a method of tending to or managing the affairs of some group of people (especially the group's business affairs) | Synonyms: disposal |
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| (noun) the act of administering medication | Synonyms: giving medication |
| (noun) the act of meting out justice according to the law | Synonyms: judicature |
| (noun) the act of governing; exercising authority | Synonyms: governance, governing, government, government activity |
| (noun) the persons (or committees or departments etc.) who make up a body for the purpose of administering something | Synonyms: brass, establishment, governance, governing body, organisation, organization |
| (noun) the tenure of a president | Synonyms: presidency, presidential term |
| administrator | (noun) someone who administers a business | Synonyms: decision maker |
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| (noun) the party appointed by a probate court to distribute the estate of someone who dies without a will or without naming an executor | - |
| (noun) someone who manages a government agency or department | Synonyms: executive |
| 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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| admirability | (noun) admirable excellence | Synonyms: admirableness, wonderfulness |
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| admirableness | (noun) admirable excellence | Synonyms: admirability, wonderfulness |
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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 |
| 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 | - |
| admixture | (noun) the act of mixing together | Synonyms: commixture, intermixture, mix, mixing, mixture |
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| (noun) an additional ingredient that is added by mixing with the base | Synonyms: intermixture |
| (noun) the state of impairing the quality or reducing the value of something | Synonyms: alloy |
| admonisher | (noun) someone who gives a warning so that a mistake can be avoided | Synonyms: monitor, reminder |
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| adopter | (noun) a person who adopts a child of other parents as his or her own child | Synonyms: adoptive parent |
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| adorability | (noun) extreme attractiveness | Synonyms: adorableness |
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| adorableness | (noun) extreme attractiveness | Synonyms: adorability |
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| adoration | (noun) the act of admiring strongly | Synonyms: idolisation, idolization |
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| (noun) the worship given to God alone | Synonyms: latria |
| (noun) a feeling of profound love and admiration | Synonyms: worship |
| adorer | (noun) someone who admires a young woman | Synonyms: admirer |
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| adornment | (noun) the action of decorating yourself with something colorful and interesting | - |
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| (noun) a decoration of color or interest that is added to relieve plainness | - |
| adoxography | (noun) fine writing in praise of trivial or base subjects | - |
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| adrenal | (noun) either of a pair of complex endocrine glands situated near the kidney | Synonyms: adrenal gland, suprarenal gland |
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| adrenalectomy | (noun) surgical removal of one or both adrenal glands | Synonyms: suprarenalectomy |
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| adrenaline | (noun) a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action | Synonyms: Adrenalin, epinephrin, epinephrine |
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| adrenarche | (noun) the increase in activity of the adrenal glands just before puberty | - |
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| adrenergic | (noun) drug that has the effects of epinephrine | Synonyms: adrenergic drug |
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| adrenocorticotrophin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotropic hormone, adrenocorticotropin, corticotrophin, corticotropin |
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| adrenocorticotropin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotrophin, adrenocorticotropic hormone, corticotrophin, corticotropin |
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| adrenosterone | (noun) a steroid having androgenic activity; obtained from the cortex of the adrenal gland | - |
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| adroitness | (noun) skillful performance or ability without difficulty | Synonyms: adeptness, deftness, facility, quickness |
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| adsorbate | (noun) a material that has been or is capable of being adsorbed | - |
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| adsorbent | (noun) a material having capacity or tendency to adsorb another substance | Synonyms: adsorbent material |
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| adsorber | (noun) an apparatus used in the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface. | - |
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| adsorption | (noun) the accumulation of molecules of a gas to form a thin film on the surface of a solid | Synonyms: surface assimilation |
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| adulator | (noun) a person who uses flattery | Synonyms: flatterer |
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| adulterant | (noun) any substance that lessens the purity or effectiveness of a substance | Synonyms: adulterator |
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| adulteration | (noun) the act of adulterating (especially the illicit substitution of one substance for another) | - |
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| (noun) being mixed with extraneous material; the product of adulterating | Synonyms: debasement |
| adulterator | (noun) a changer who lessens the purity or effectiveness of a substance | - |
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| (noun) any substance that lessens the purity or effectiveness of a substance | Synonyms: adulterant |
| adulterer | (noun) someone who commits adultery or fornication | Synonyms: fornicator |
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| adulteress | (noun) a woman adulterer | Synonyms: fornicatress, hussy, jade, loose woman, slut, strumpet, trollop |
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| adulterousness | (noun) The quality of being adulterous, involving sexual intercourse by a married person with someone other than their spouse. | - |
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| adultery | (noun) extramarital sex that willfully and maliciously interferes with marriage relations | Synonyms: criminal conversation, fornication |
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| adumbration | (noun) a sketchy or imperfect or faint representation | - |
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| (noun) the act of providing vague advance indications; representing beforehand | Synonyms: foreshadowing, prefiguration |
| advancer | (noun) someone who advances | - |
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| adventure | (noun) a wild and exciting undertaking (not necessarily lawful) | Synonyms: dangerous undertaking, escapade, risky venture |
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| adventurer | (noun) a person who enjoys taking risks | Synonyms: venturer |
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| (noun) someone who travels into little known regions (especially for some scientific purpose) | Synonyms: explorer |
| adventuress | (noun) a woman adventurer | - |
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| adventurism | (noun) recklessness in politics or foreign affairs | - |
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| adventurousness | (noun) the trait of being adventurous | Synonyms: venturesomeness |
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| adverb | (noun) a word that modifies something other than a noun | - |
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| (noun) the word class that qualifies verbs or clauses | - |
| adverbial | (noun) a word or group of words function as an adverb | - |
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| adversary | (noun) someone who offers opposition | Synonyms: antagonist, opponent, opposer, resister |
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| adversity | (noun) a stroke of ill fortune; a calamitous event | - |
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| (noun) a state of misfortune or affliction | Synonyms: hard knocks, hardship |
| advert | (noun) a public promotion of some product or service | Synonyms: ad, advertisement, advertising, advertizement, advertizing |
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| advertence | (noun) the process of being heedful | Synonyms: advertency |
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| advertency | (noun) the process of being heedful | Synonyms: advertence |
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| advertisement | (noun) a public promotion of some product or service | Synonyms: ad, advert, advertising, advertizement, advertizing |
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| advertiser | (noun) someone whose business is advertising | Synonyms: adman, advertizer |
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| advertising | (noun) the business of drawing public attention to goods and services | Synonyms: merchandising, publicizing |
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| (noun) a public promotion of some product or service | Synonyms: ad, advert, advertisement, advertizement, advertizing |
| advertizement | (noun) a public promotion of some product or service | Synonyms: ad, advert, advertisement, advertising, advertizing |
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| advertizer | (noun) someone whose business is advertising | Synonyms: adman, advertiser |
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| advertizing | (noun) a public promotion of some product or service | Synonyms: ad, advert, advertisement, advertising, advertizement |
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| advertorial | (noun) an advertisement that is written and presented in the style of an editorial or journalistic report | - |
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| adviser | (noun) an expert who gives advice | Synonyms: advisor, consultant |
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| advisor | (noun) an expert who gives advice | Synonyms: adviser, consultant |
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| advisory | (noun) an announcement that usually advises or warns the public of some threat | - |
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| advocator | (noun) a person who pleads for a cause or propounds an idea | Synonyms: advocate, exponent, proponent |
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| aeciospore | (noun) spore of a rust fungus formed in an aecium | - |
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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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| aepyornis | (noun) huge (to 9 ft.) extinct flightless bird of Madagascar | Synonyms: elephant bird |
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| aeration | (noun) the act of charging a liquid with a gas making it effervescent | - |
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| (noun) the process of exposing to air (so as to purify) | - |
| aerator | (noun) an apparatus for exposing something to the air (as sewage) | - |
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| aerial | (noun) a pass to a receiver downfield from the passer | Synonyms: forward pass |
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| (noun) an electrical device that sends or receives radio or television signals | Synonyms: antenna, transmitting aerial |
| aerialist | (noun) an acrobat who performs in the air (as on a rope or trapeze) | - |
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| aerides | (noun) any orchid of the genus Aerides | - |
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| aerie | (noun) any habitation at a high altitude | Synonyms: aery, eyrie, eyry |
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| (noun) the lofty nest of a bird of prey (such as a hawk or eagle) | Synonyms: aery, eyrie, eyry |
| aerobatics | (noun) the performance of stunts while in flight in an aircraft | Synonyms: acrobatics, stunt flying, stunting |
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| aerobe | (noun) an organism (especially a bacterium) that requires air or free oxygen for life | - |
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| aerobics | (noun) exercise that increases the need for oxygen | Synonyms: aerobic exercise |
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| aerobiosis | (noun) life sustained in the presence of air or oxygen | - |
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| aerodontalgia | (noun) pain in the teeth that results from a change in air pressure (as in flying or mountain climbing) | - |
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| aerodrome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: airdrome, airport, drome |
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| aerodynamics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aeromechanics |
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| aeroembolism | (noun) obstruction of the circulatory system caused by an air bubble as, e.g., accidentally during surgery or hypodermic injection or as a complication from scuba diving | Synonyms: air embolism, gas embolism |
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| (noun) pain resulting from rapid change in pressure | Synonyms: air embolism, bends, caisson disease, decompression sickness, gas embolism |
| aerofoil | (noun) a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight | Synonyms: airfoil, control surface, surface |
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| aerogenerator | (noun) generator that extracts usable energy from winds | Synonyms: wind generator, windmill |
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| aerogram | (noun) a letter sent by air mail | Synonyms: aerogramme, air letter, airmail letter |
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| aerogramme | (noun) a letter sent by air mail | Synonyms: aerogram, air letter, airmail letter |
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| aerolite | (noun) a stony meteorite consisting of silicate minerals | - |
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| aerology | (noun) meteorology of the total extent of the atmosphere; especially the upper layers | - |
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| aeromechanics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aerodynamics |
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| aeromedicine | (noun) the study and treatment of disorders associated with flight (especially with space flight) | Synonyms: aerospace medicine, aviation medicine |
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| aeronaut | (noun) someone who operates an aircraft | Synonyms: aviator, flier, flyer |
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| aeronautics | (noun) the theory and practice of navigation through air or space | Synonyms: astronautics |
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