| cat | (noun) feline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats | Synonyms: true cat |
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| (noun) any of several large cats typically able to roar and living in the wild | Synonyms: big cat |
| (noun) a whip with nine knotted cords | Synonyms: cat-o'-nine-tails |
| (noun) a large tracked vehicle that is propelled by two endless metal belts; frequently used for moving earth in construction and farm work | Synonyms: Caterpillar |
| (noun) the leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric stimulant | Synonyms: African tea, Arabian tea, kat, khat, qat, quat |
| (noun) a spiteful woman gossip | - |
| (noun) an informal term for a youth or man | Synonyms: bozo, guy, hombre, sod |
| (verb) eject the contents of the stomach through the mouth | Synonyms: barf, be sick, cast, chuck, disgorge, honk, puke, purge, regorge, regurgitate, retch, sick, spew, spue, throw up, upchuck, vomit, vomit up |
| (verb) beat with a cat-o'-nine-tails | - |
| catabatic | (adjective) of an air current or wind; moving downward or down a slope because of cooling especially at night | Synonyms: katabatic |
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| catabiosis | (noun) normal aging of cells | - |
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| catabolic | (adjective) characterized by destructive metabolism | Synonyms: katabolic |
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| (adjective) relating to or characterized by catabolism | Synonyms: katabolic |
| catabolise | (verb) subject to catabolism | Synonyms: catabolize |
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| catabolism | (noun) breakdown in living organisms of more complex substances into simpler ones together with release of energy | Synonyms: destructive metabolism, dissimilation, katabolism |
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| catabolize | (verb) subject to catabolism | Synonyms: catabolise |
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| catacaustic | (noun) a caustic curve formed by light reflecting from a curved surface. | - |
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| catachresis | (noun) strained or paradoxical use of words either in error (as `blatant' to mean `flagrant') or deliberately (as in a mixed metaphor: `blind mouths') | - |
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| catachrestic | (adjective) constituting or characterized by or given to catachresis | Synonyms: catachrestical |
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| catachrestical | (adjective) constituting or characterized by or given to catachresis | Synonyms: catachrestic |
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| cataclinal | (adjective) of valleys and rivers; running in the direction of the dip in surrounding rock strata | - |
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| cataclysm | (noun) an event resulting in great loss and misfortune | Synonyms: calamity, catastrophe, disaster, tragedy |
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| (noun) a sudden violent change in the earth's surface | Synonyms: catastrophe |
| cataclysmal | (adjective) severely destructive | Synonyms: cataclysmic |
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| cataclysmic | (adjective) severely destructive | Synonyms: cataclysmal |
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| catacomb | (noun) an underground tunnel with recesses where bodies were buried (as in ancient Rome) | - |
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| catacorner | (adjective) slanted across a polygon on a diagonal line | Synonyms: cata-cornered, cater-cornered, catercorner, catty-corner, catty-cornered, kitty-corner, kitty-cornered |
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| catadromous | (adjective) migrating from fresh water to the sea to spawn | - |
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| catafalque | (noun) a decorated bier on which a coffin rests in state during a funeral | - |
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| catalase | (noun) enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and water | - |
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| catalatic | (adjective) of or relating to the enzyme catalase | - |
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| catalectic | (adjective) (verse) metrically incomplete; especially lacking one or more syllables in the final metrical foot | - |
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| (noun) (prosody) a line of verse that lacks a syllable in the last metrical foot | - |
| catalepsy | (noun) a trancelike state with loss of voluntary motion and failure to react to stimuli | - |
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| cataleptic | (adjective) of or having characteristics of or affected with catalepsy | - |
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| (noun) a person suffering from catalepsy | - |
| catalexis | (noun) the absence of a syllable in the last foot of a line or verse | - |
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| catalog | (noun) a book or pamphlet containing an enumeration of things | Synonyms: catalogue |
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| (noun) a complete list of things; usually arranged systematically | Synonyms: catalogue |
| (verb) make an itemized list or catalog of; classify | Synonyms: catalogue |
| (verb) make a catalogue, compile a catalogue | Synonyms: catalogue |
| cataloger | (noun) a librarian who classifies publications according to a categorial system | Synonyms: cataloguer |
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| catalogue | (noun) a book or pamphlet containing an enumeration of things | Synonyms: catalog |
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| (noun) a complete list of things; usually arranged systematically | Synonyms: catalog |
| (verb) make an itemized list or catalog of; classify | Synonyms: catalog |
| (verb) make a catalogue, compile a catalogue | Synonyms: catalog |
| cataloguer | (noun) a librarian who classifies publications according to a categorial system | Synonyms: cataloger |
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| catalpa | (noun) tree of the genus Catalpa with large leaves and white flowers followed by long slender pods | Synonyms: Indian bean |
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| catalufa | (noun) brightly colored carnivorous fish of western Atlantic and West Indies waters | Synonyms: Priacanthus arenatus |
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| catalyse | (verb) change by catalysis or cause to catalyze | Synonyms: catalyze |
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| catalysis | (noun) acceleration of a chemical reaction induced by the presence of material that is chemically unchanged at the end of the reaction | Synonyms: contact action |
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| catalyst | (noun) something that causes an important event to happen | - |
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| (noun) (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected | Synonyms: accelerator |
| catalytic | (adjective) relating to or causing or involving catalysis | - |
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| catalytically | (adverb) by catalytic action; in a catalytic manner | - |
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| catalyze | (verb) change by catalysis or cause to catalyze | Synonyms: catalyse |
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| catamaran | (noun) a boat with two parallel hulls held together by single deck | - |
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| catamenia | (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: flow, menses, menstruation, menstruum, period |
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| catamenial | (adjective) of or relating to menstruation or the menses | Synonyms: menstrual |
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| catamite | (noun) a boy who submits to a sexual relationship with a man | - |
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| catamount | (noun) large American feline resembling a lion | Synonyms: cougar, Felis concolor, mountain lion, painter, panther, puma |
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| (noun) short-tailed wildcats with usually tufted ears; valued for their fur | Synonyms: lynx |
| catamountain | (noun) bushy-tailed wildcat of Europe that resembles the domestic cat and is regarded as the ancestor of the domestic cat | Synonyms: European wildcat, Felis silvestris |
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| catananche | (noun) any of several plants of the genus Catananche having long-stalked heads of blue or yellow flowers | - |
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| cataphasia | (noun) a speech disorder in which the same word is repeated several times in succession | - |
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| cataphatic | (adjective) of or relating to the religious belief that God can be known to humans positively or affirmatively | - |
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| cataphatism | (noun) the religious belief that God has given enough clues to be known to humans positively and affirmatively (e.g., God created Adam `in his own image') | - |
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| cataphoresis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: dielectrolysis, electrophoresis, ionophoresis |
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| cataphoretic | (adjective) of or relating to electrophoresis | Synonyms: electrophoretic |
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| cataphract | (noun) armor that protects the wearer's whole body | Synonyms: body armor, body armour, coat of mail, suit of armor, suit of armour |
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| cataphyll | (noun) a reduced or scarcely developed leaf at the start of a plant's life (i.e., cotyledons) or in the early stages of leaf development | - |
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| cataplasia | (noun) (biology) degenerative reversion of cells or tissue to a less differentiated or more primitive form | - |
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| cataplasm | (noun) a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc. | Synonyms: plaster, poultice |
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| cataplastic | (adjective) of or relating to cataplasia | - |
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| catapult | (noun) an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles | - |
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| (noun) a plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones | Synonyms: sling, slingshot |
| (noun) a device that launches aircraft from a warship | Synonyms: launcher |
| (verb) shoot forth or launch, as if from a catapult | - |
| (verb) hurl as if with a sling | Synonyms: sling |
| catapultian | (adjective) of or like a catapult | Synonyms: catapultic |
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| catapultic | (adjective) of or like a catapult | Synonyms: catapultian |
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| cataract | (noun) a large waterfall; violent rush of water over a precipice | - |
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| (noun) an eye disease that involves the clouding or opacification of the natural lens of the eye | - |
| catarrh | (noun) inflammation of the nose and throat with increased production of mucus | - |
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| catarrhal | (adjective) of or relating to a catarrh | - |
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| catarrhine | (adjective) of or related to Old World monkeys that have nostrils together and opening downward | Synonyms: catarrhinian |
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| (noun) of Africa or Arabia or Asia; having nonprehensile tails and nostrils close together | Synonyms: Old World monkey |
| catarrhinian | (adjective) of or related to Old World monkeys that have nostrils together and opening downward | Synonyms: catarrhine |
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| catastrophe | (noun) an event resulting in great loss and misfortune | Synonyms: calamity, cataclysm, disaster, tragedy |
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| (noun) a sudden violent change in the earth's surface | Synonyms: cataclysm |
| (noun) a state of extreme (usually irremediable) ruin and misfortune | Synonyms: disaster |
| catastrophic | (adjective) extremely harmful; bringing physical or financial ruin | Synonyms: ruinous |
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| catastrophically | (adverb) with unfortunate consequences | - |
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| catathymia | (noun) A state in which mental processes are under the control of the emotions. | - |
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| catatonia | (noun) a form of schizophrenia characterized by a tendency to remain in a fixed stuporous state for long periods; the catatonia may give way to short periods of extreme excitement | Synonyms: catatonic schizophrenia, catatonic type schizophrenia |
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| (noun) extreme tonus; muscular rigidity; a common symptom in catatonic schizophrenia | - |
| catatonic | (adjective) characterized by catatonia especially either rigidity or extreme laxness of limbs | - |
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| catbird | (noun) North American songbird whose call resembles a cat's mewing | Synonyms: Dumetella carolinensis, gray catbird, grey catbird |
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| (noun) any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females | Synonyms: bowerbird |
| catboat | (noun) a sailboat with a single mast set far forward | - |
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| catbrier | (noun) a very prickly woody vine of the eastern United States growing in tangled masses having tough round stems with shiny leathery leaves and small greenish flowers followed by clusters of inedible shiny black berries | Synonyms: briar, brier, bullbrier, greenbrier, horse-brier, horse brier, Smilax rotundifolia |
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| catcall | (noun) a cry expressing disapproval | - |
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| (verb) utter catcalls at | - |
| catch | (noun) the act of catching an object with the hands | Synonyms: grab, snap, snatch |
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| (noun) the act of apprehending (especially apprehending a criminal) | Synonyms: apprehension, arrest, collar, pinch, taking into custody |
| (noun) a cooperative game in which a ball is passed back and forth | - |
| (noun) a fastener that fastens or locks a door or window | - |
| (noun) a restraint that checks the motion of something | Synonyms: stop |
| (noun) a drawback or difficulty that is not readily evident | Synonyms: gimmick |
| (noun) a break or check in the voice (usually a sign of strong emotion) | - |
| (noun) anything that is caught (especially if it is worth catching) | - |
| (noun) a person regarded as a good matrimonial prospect | Synonyms: match |
| (noun) the quantity that was caught | Synonyms: haul |
| (verb) come down with | - |
| (verb) be struck or affected by | - |
| (verb) delay or hold up; prevent from proceeding on schedule or as planned | - |
| (verb) detect a blunder or misstep | Synonyms: trip up |
| (verb) discover or come upon accidentally, suddenly, or unexpectedly; catch somebody doing something or in a certain state | - |
| (verb) grasp with the mind or develop an understanding of | Synonyms: get |
| (verb) become aware of | - |
| (verb) be the catcher | - |
| (verb) catch up with and possibly overtake | Synonyms: catch up with, overtake |
| (verb) take hold of so as to seize or restrain or stop the motion of | Synonyms: grab |
| (verb) succeed in catching or seizing, especially after a chase | Synonyms: capture, get |
| (verb) capture as if by hunting, snaring, or trapping | Synonyms: capture |
| (verb) to hook or entangle | Synonyms: hitch |
| (verb) attract and fix | Synonyms: arrest, get |
| (verb) cause to become accidentally or suddenly caught, ensnared, or entangled | - |
| (verb) spread or be communicated | - |
| (verb) take in and retain | - |
| (verb) reach with a blow or hit in a particular spot | Synonyms: get |
| (verb) apprehend and reproduce accurately | Synonyms: get |
| (verb) attract; cause to be enamored | Synonyms: becharm, beguile, bewitch, captivate, capture, charm, enamor, enamour, enchant, entrance, fascinate, trance |
| (verb) reach in time | - |
| (verb) hear, usually without the knowledge of the speakers | Synonyms: overhear, take in |
| (verb) perceive with the senses quickly, suddenly, or momentarily | Synonyms: pick up |
| (verb) see or watch | Synonyms: see, take in, view, watch |
| (verb) suffer from the receipt of | Synonyms: get |
| (verb) perceive by hearing | Synonyms: get |
| (verb) get or regain something necessary, usually quickly or briefly | - |
| (verb) check oneself during an action | - |
| (verb) start burning | - |
| catchall | (noun) an enclosure or receptacle for odds and ends | - |
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| catcher | (noun) the position on a baseball team of the player who is stationed behind home plate and who catches the balls that the pitcher throws | - |
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| (noun) (baseball) the person who plays the position of catcher | Synonyms: backstop |
| catchfly | (noun) mostly perennial herbs with sticky stems that catch insects; widespread in north temperate zone | Synonyms: lychnis |
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| (noun) any plant of the genus Silene | Synonyms: campion, silene |
| catching | (adjective) (of disease) capable of being transmitted by infection | Synonyms: communicable, contagious, contractable, transmissible, transmittable |
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| (noun) (baseball) playing the position of catcher on a baseball team | - |
| (noun) the act of detecting something; catching sight of something | Synonyms: detection, espial, spotting, spying |
| (noun) becoming infected | Synonyms: contracting |
| catchment | (noun) a structure in which water is collected (especially a natural drainage area) | - |
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| catchpenny | (adjective) designed to sell quickly without concern for quality | - |
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| catchphrase | (noun) a phrase that has become a catchword | Synonyms: catch phrase |
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| catchweed | (noun) annual having the stem beset with curved prickles; North America and Europe and Asia | Synonyms: cleavers, clivers, Galium aparine, goose grass, spring cleavers |
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| catchword | (noun) a favorite saying of a group, organization or individual | Synonyms: motto, shibboleth, slogan |
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| (noun) a word printed at the top of the page of a dictionary or other reference book to indicate the first or last item on that page | Synonyms: guide word, guideword |
| catchy | (adjective) likely to attract attention | Synonyms: attention-getting |
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| (adjective) having concealed difficulty | Synonyms: tricky |
| catclaw | (noun) erect shrub with small if any spines having racemes of white to yellow flowers followed by curved pointed pods and black shiny seeds; West Indies and Florida | Synonyms: black bead, cat's-claw, Pithecellobium unguis-cati |
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| catechesis | (noun) oral religious instruction (as before baptism or confirmation) | - |
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| catechetic | (adjective) of or relating to or resembling a rigorous catechism | Synonyms: catechistic |
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| (adjective) of or relating to or involving catechesis | Synonyms: catechetical |
| catechetical | (adjective) of or relating to or involving catechesis | Synonyms: catechetic |
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| catechin | (noun) a tannic acid that is extracted from black catechu as a white crystalline substance | - |
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| catechise | (verb) examine through questioning and answering | Synonyms: catechize |
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| (verb) give religious instructions to | Synonyms: catechize |
| catechism | (noun) an elementary book summarizing the principles of a Christian religion; written as questions and answers | - |
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| (noun) a series of questions put to an individual (such as a political candidate) to elicit their views | - |
| catechismal | (adjective) of or relating to a catechism summarizing the principles of Christianity | - |
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| catechist | (noun) one who instructs catechumens in preparation for baptism (especially one using a catechism) | - |
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| catechistic | (adjective) of or relating to or resembling a rigorous catechism | Synonyms: catechetic |
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| catechize | (verb) examine through questioning and answering | Synonyms: catechise |
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| (verb) give religious instructions to | Synonyms: catechise |
| catecholamine | (noun) any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland | - |
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| catechu | (noun) East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu | Synonyms: Acacia catechu, Jerusalem thorn |
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| (noun) extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails; formerly used medicinally | Synonyms: black catechu |
| catechumen | (noun) a new convert being taught the principles of Christianity by a catechist | Synonyms: neophyte |
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| categorem | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categoreme |
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| categorematic | (adjective) of a term or phrase capable of standing as the subject or (especially) the predicate of a proposition | - |
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| categoreme | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categorem |
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