| ambitiousness | (noun) a strong drive for success | Synonyms: ambition |
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| amebous | (adjective) pertaining to or resembling amoebae | Synonyms: ameban, amebic, amoeban, amoebic, amoebous |
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| amentaceous | (adjective) (of plants) bearing or characterized by aments or catkins | Synonyms: amentiferous |
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| amentiferous | (adjective) (of plants) bearing or characterized by aments or catkins | Synonyms: amentaceous |
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| ametabolous | (adjective) undergoing slight or no metamorphosis | Synonyms: ametabolic |
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| amoebous | (adjective) pertaining to or resembling amoebae | Synonyms: ameban, amebic, amebous, amoeban, amoebic |
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| amorous | (adjective) inclined toward or displaying love | Synonyms: amative |
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| (adjective) expressive of or exciting sexual love or romance | Synonyms: amatory, romantic |
| amorously | (adverb) in an amorous manner | - |
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| amorousness | (noun) a feeling of love or fondness | Synonyms: enamoredness |
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| (noun) the arousal of feelings of sexual desire | Synonyms: amativeness, eroticism, erotism, sexiness |
| amorphous | (adjective) lacking the system or structure characteristic of living bodies | Synonyms: unstructured |
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| (adjective) without real or apparent crystalline form | Synonyms: uncrystallised, uncrystallized |
| (adjective) unclear because vague or badly organized | - |
| (adjective) having no definite form or distinct shape | Synonyms: formless, shapeless |
| (adjective) (of a group of people or an organization) unorganized or unfocused | - |
| amount | (noun) how much there is or how many there are of something that you can quantify | Synonyms: measure, quantity |
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| (noun) the relative magnitude of something with reference to a criterion | - |
| (noun) a quantity obtained by the addition of a group of numbers | Synonyms: sum, total |
| (noun) a quantity of money | Synonyms: amount of money, sum, sum of money |
| (verb) to measure up to in kind or quality | Synonyms: add up, come |
| (verb) add up in number or quantity | Synonyms: add up, come, number, total |
| (verb) be tantamount or equivalent to | - |
| amour | (noun) a usually secretive or illicit sexual relationship | Synonyms: affair, affaire, intimacy, involvement, liaison |
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| amphibious | (adjective) operating or living on land and in water | - |
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| (adjective) relating to or characteristic of animals of the class Amphibia | Synonyms: amphibian |
| amphitropous | (adjective) (of a plant ovule) partly inverted; turned back 90 degrees on its stalk | - |
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| ampoule | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampul, ampule, phial, vial |
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| amylaceous | (adjective) resembling starch | Synonyms: amyloid, amyloidal, farinaceous, starchlike |
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| anachronous | (adjective) chronologically misplaced | Synonyms: anachronic, anachronistic |
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| anadromous | (adjective) migrating from the sea to fresh water to spawn | - |
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| analogous | (adjective) corresponding in function but not in evolutionary origin | - |
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| (adjective) similar or equivalent in some respects though otherwise dissimilar | Synonyms: correspondent |
| analogously | (adverb) in an analogous manner | - |
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| anasarcous | (adjective) characterized by or affected by dropsy | - |
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| anatropous | (adjective) (of a plant ovule) completely inverted; turned back 180 degrees on its stalk | Synonyms: inverted |
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| androgenous | (adjective) of or related to androgenesis | Synonyms: androgenetic |
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| androgynous | (adjective) having both male and female characteristics | - |
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| (adjective) relating to or exhibiting both female and male sex organs but with a predominantly female appearance | - |
| anemophilous | (adjective) of flowering plants (especially grasses etc) that are pollinated by the wind | - |
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| anencephalous | (adjective) characterized by partial or total absence of a brain | Synonyms: anencephalic |
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| anestrous | (adjective) (of lower mammals) not in a state of estrus; not in heat | - |
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| (adjective) of or relating to anestrus | Synonyms: anestric, anoestrous |
| anfractuous | (adjective) full of twists and turns | - |
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| anginous | (adjective) of or related to the pain of angina pectoris | Synonyms: anginal, anginose |
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| angiocarpous | (adjective) having or being fruit enclosed in a shell or husk | Synonyms: angiocarpic |
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| angiomatous | (adjective) of or related to or having a tumor of the kind known as an angioma | - |
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| angiospermous | (adjective) of or related to or characteristic of plants that are angiosperms | - |
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| anhydrous | (adjective) without water; especially without water of crystallization | - |
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| anisogamous | (adjective) relating to a type of sexual reproduction in which the gametes are dissimilar in some respect (as size or shape) | Synonyms: anisogamic |
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| anjou | (noun) a pear with firm flesh and a green skin | - |
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| announce | (verb) make known; make an announcement | Synonyms: denote |
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| (verb) foreshadow or presage | Synonyms: annunciate, foretell, harbinger, herald |
| (verb) announce publicly or officially | Synonyms: declare |
| (verb) give the names of | - |
| announced | (adjective) declared publicly; made widely known | Synonyms: proclaimed |
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| announcement | (noun) a public statement containing information about an event that has happened or is going to happen | Synonyms: promulgation |
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| (noun) a formal public statement | Synonyms: annunciation, declaration, proclamation |
| announcer | (noun) reads news, commercials on radio or television | - |
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| (noun) someone who proclaims a message publicly | - |
| anoestrous | (adjective) of or relating to anestrus | Synonyms: anestric, anestrous |
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| anomalous | (adjective) deviating from the general or common order or type | - |
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| anomalously | (adverb) in an anomalous manner | - |
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| anomalousness | (noun) deviation from the normal or common order or form or rule | Synonyms: anomaly |
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| anonymous | (adjective) having no known name or identity or known source | Synonyms: anon. |
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| (adjective) not known or lacking marked individuality | - |
| anonymously | (adverb) without giving a name | - |
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| anthophagous | (adjective) feeding on flowers | Synonyms: anthophilous |
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| anthophilous | (adjective) feeding on flowers | Synonyms: anthophagous |
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| anthropomorphous | (adjective) suggesting human characteristics for animals or inanimate things | Synonyms: anthropomorphic, humanlike |
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| anthropophagous | (adjective) of or relating to eaters of human flesh | - |
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| antimonious | (adjective) relating to or derived from antimony | Synonyms: antimonic |
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| antireligiousness | (noun) The state or condition of being opposed to religion. | - |
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| antitumour | (adjective) used in the treatment of cancer | Synonyms: anticancer, antineoplastic, antitumor |
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| antonymous | (adjective) of words: having opposite meanings | - |
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| anurous | (adjective) not having a tail | Synonyms: tailless |
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| anxious | (adjective) eagerly desirous | Synonyms: dying |
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| (adjective) causing or fraught with or showing anxiety | Synonyms: nervous, queasy, uneasy, unquiet |
| anxiously | (adverb) with anxiety or apprehension | Synonyms: apprehensively, uneasily |
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| anxiousness | (noun) a feeling of mild anxiety about possible developments | Synonyms: disquiet |
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| (noun) (psychiatry) a relatively permanent state of worry and nervousness occurring in a variety of mental disorders, usually accompanied by compulsive behavior or attacks of panic | Synonyms: anxiety |
| aoudad | (noun) wild sheep of northern Africa | Synonyms: Ammotragus lervia, arui, audad, Barbary sheep, maned sheep |
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| apetalous | (adjective) (of flowers) having no petals | Synonyms: petalless |
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| aphyllous | (adjective) devoid of leaves | - |
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| apivorous | (adjective) feeding on bees | - |
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| apocarpous | (adjective) (of ovaries of flowering plants) consisting of carpels that are free from one another as in buttercups or roses | - |
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| apocynaceous | (adjective) of or relating to tropical plants of the family Apocynaceae | - |
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| apodous | (adjective) (of snakes and eels) naturally footless | Synonyms: apodal |
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| apogamous | (adjective) of or relating to the development of an embryo in the absence of fertilization | Synonyms: apogametic, apogamic |
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| apterous | (adjective) (of insects) without wings | Synonyms: apteral |
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| aqueous | (adjective) produced by the action of water | Synonyms: sedimentary |
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| (adjective) similar to or containing or dissolved in water | - |
| aquiferous | (adjective) of or relating to an aquifer | - |
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| araceous | (adjective) relating to a plant of the family Araceae | Synonyms: aroid |
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| arboraceous | (adjective) abounding in trees | Synonyms: arboreous, woodsy, woody |
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| arboreous | (adjective) inhabiting or frequenting trees | Synonyms: arboreal, tree-living |
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| (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arborescent, arboresque, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike |
| (adjective) abounding in trees | Synonyms: arboraceous, woodsy, woody |
| arborous | (adjective) of or relating to or formed by trees | Synonyms: arborary, arboreal, arborical |
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| arbour | (noun) a framework that supports climbing plants | Synonyms: arbor, bower, pergola |
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| ardour | (noun) intense feeling of love | Synonyms: ardor |
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| (noun) a feeling of strong eagerness (usually in favor of a person or cause) | Synonyms: ardor, elan, zeal |
| (noun) feelings of great warmth and intensity | Synonyms: ardor, fervency, fervidness, fervor, fervour, fire |
| arduous | (adjective) difficult to accomplish; demanding considerable mental effort and skill | - |
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| (adjective) characterized by effort to the point of exhaustion; especially physical effort | Synonyms: backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome |
| (adjective) taxing to the utmost; testing powers of endurance | Synonyms: straining, strenuous |
| arduously | (adverb) in an arduous manner | - |
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| arduousness | (noun) extreme effortfulness | Synonyms: strenuousness |
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| arenaceous | (adjective) resembling or containing or abounding in sand; or growing in sandy areas | Synonyms: sandlike, sandy |
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| arenicolous | (adjective) growing or living or burrowing in sand | - |
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| argentiferous | (adjective) containing or yielding silver | - |
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| argentous | (adjective) relating to compounds in which silver is univalent | - |
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| argillaceous | (adjective) resembling or containing clay | Synonyms: clayey |
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| armour | (noun) tough more-or-less rigid protective covering of an animal or plant | Synonyms: armor |
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| (noun) protective covering made of metal and used in combat | Synonyms: armor |
| (noun) a military unit consisting of armored fighting vehicles | Synonyms: armor |
| (verb) equip with armor | Synonyms: armor |
| armoured | (adjective) protected by armor (used of persons or things military) | Synonyms: armored |
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| (adjective) used of animals; provided with protective covering | Synonyms: armored |
| armourer | (noun) a manufacturer of firearms | Synonyms: armorer |
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| (noun) an enlisted man responsible for the upkeep of small arms and machine guns etc. | Synonyms: armorer, artificer |
| (noun) a worker skilled in making armor or arms | Synonyms: armorer |
| armoury | (noun) a place where arms are manufactured | Synonyms: armory, arsenal |
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| (noun) a military structure where arms and ammunition and other military equipment are stored and training is given in the use of arms | Synonyms: armory, arsenal |
| (noun) all the weapons and equipment that a country has | Synonyms: armory, arsenal |
| (noun) a collection of resources | Synonyms: armory, inventory |
| around | (adverb) in circumference | - |
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| (adverb) in the area or vicinity | Synonyms: about |
| (adverb) from beginning to end; throughout | Synonyms: round |
| (adverb) (of quantities) imprecise but fairly close to correct | Synonyms: about, approximately, close to, just about, more or less, or so, roughly, some |
| (adverb) used of movement to or among many different places or in no particular direction | Synonyms: about |
| (adverb) by a circular or circuitous route | - |
| (adverb) in a circle or circular motion | - |
| (adverb) all around or on all sides | Synonyms: about |
| (adverb) to a particular destination either specified or understood | - |
| (adverb) in or to a reversed position or direction | Synonyms: about |
| arousal | (noun) the act of arousing | Synonyms: rousing |
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| (noun) mutual sexual fondling prior to sexual intercourse | Synonyms: foreplay, stimulation |
| (noun) awakening from sleep | - |
| (noun) a state of heightened physiological activity | - |
| arouse | (verb) cause to be alert and energetic | Synonyms: brace, energise, energize, perk up, stimulate |
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| (verb) cause to become awake or conscious | Synonyms: awaken, rouse, wake, wake up, waken |
| (verb) stop sleeping | Synonyms: awake, awaken, come alive, wake, wake up, waken |
| (verb) summon into action or bring into existence, often as if by magic | Synonyms: bring up, call down, call forth, conjure, conjure up, evoke, invoke, put forward, raise, stir |
| (verb) call forth (emotions, feelings, and responses) | Synonyms: elicit, enkindle, evoke, fire, kindle, provoke, raise |
| (verb) to evoke sexual feelings | Synonyms: excite, sex, turn on, wind up |
| (verb) to begin moving | Synonyms: stir |
| aroused | (adjective) (of persons) excessively affected by emotion | Synonyms: emotional, excited, worked up |
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| (adjective) aroused to action | - |
| (adjective) emotionally aroused | Synonyms: stimulated, stirred, stirred up |
| (adjective) keenly excited (especially sexually) or indicating excitement | Synonyms: ablaze, aflame |
| (adjective) feeling great sexual desire | Synonyms: horny, randy, ruttish, steamy, turned on |
| (adjective) brought to a state of great tension | Synonyms: wound up |
| arouser | (noun) someone who rouses others from sleep | Synonyms: rouser, waker |
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| arsenious | (adjective) relating to compounds in which arsenic is trivalent | - |
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| arteriovenous | (adjective) connecting an artery to a vein | - |
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| arthropodous | (adjective) of or relating to invertebrates of the phylum Arthropoda | Synonyms: arthropodal, arthropodan |
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| arthrosporous | (adjective) of or relating to arthrospores | Synonyms: arthrosporic |
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| artiodactylous | (adjective) of or relating to or belonging to mammals of the order Artiodactyla | Synonyms: artiodactyl, even-toed |
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| arundinaceous | (adjective) of or relating to or resembling reedlike plants of the genus Arundinaria | - |
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| asclepiadaceous | (adjective) of or relating to plants of the milkweed family | - |
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| ascocarpous | (adjective) of or relating to ascocarps | - |
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| ascomycetous | (adjective) related to or characteristic of fungi of the class Ascomycetes | - |
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