| collaborationism | (noun) act of cooperating traitorously with an enemy that is occupying your country | Synonyms: collaboration, quislingism |
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| collaborationist | (noun) someone who collaborates with an enemy occupying force | Synonyms: collaborator, quisling |
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| collaborative | (adjective) accomplished by collaboration | - |
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| collaborator | (noun) an associate in an activity or endeavor or sphere of common interest | Synonyms: cooperator, pardner, partner |
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| (noun) someone who collaborates with an enemy occupying force | Synonyms: collaborationist, quisling |
| (noun) someone who assists in a plot | Synonyms: confederate, henchman, partner in crime |
| collage | (noun) a paste-up made by sticking together pieces of paper or photographs to form an artistic image | Synonyms: montage |
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| (noun) any collection of diverse things | - |
| collagen | (noun) a fibrous scleroprotein in bone and cartilage and tendon and other connective tissue; yields gelatin on boiling | - |
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| collagenase | (noun) any enzyme that catalyzes the hydrolysis of collagen and gelatin | - |
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| collagenic | (adjective) relating to or consisting of collagen | Synonyms: collagenous |
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| collagenous | (adjective) relating to or consisting of collagen | Synonyms: collagenic |
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| collapsable | (adjective) capable of collapsing or being collapsed | Synonyms: collapsible |
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| collapse | (noun) the act of throwing yourself down; collapse; sink | Synonyms: flop |
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| (noun) a natural event caused by something suddenly falling down or caving in | - |
| (noun) a sudden large decline of business or the prices of stocks (especially one that causes additional failures) | Synonyms: crash |
| (noun) an abrupt failure of function or complete physical exhaustion | Synonyms: prostration |
| (verb) collapse due to fatigue, an illness, or a sudden attack | Synonyms: break down |
| (verb) lose significance, effectiveness, or value | - |
| (verb) suffer a nervous breakdown | Synonyms: break up, crack, crack up, crock up |
| (verb) break down, literally or metaphorically | Synonyms: break, cave in, fall in, founder, give, give way |
| (verb) fold or close up | - |
| (verb) fall apart | Synonyms: break down, crumble, crumple, tumble |
| (verb) cause to burst | Synonyms: burst |
| collapsible | (adjective) capable of collapsing or being collapsed | Synonyms: collapsable |
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| collar | (noun) the act of apprehending (especially apprehending a criminal) | Synonyms: apprehension, arrest, catch, pinch, taking into custody |
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| (noun) a figurative restraint | Synonyms: leash |
| (noun) a band that fits around the neck and is usually folded over | Synonyms: neckband |
| (noun) necklace that fits tightly around a woman's neck | Synonyms: choker, dog collar, neckband |
| (noun) a band of leather or rope that is placed around an animal's neck as a harness or to identify it | - |
| (noun) the stitching that forms the rim of a shoe or boot | Synonyms: shoe collar |
| (noun) a short ring fastened over a rod or shaft to limit, guide, or secure a machine part | - |
| (noun) anything worn or placed about the neck | - |
| (noun) (zoology) an encircling band or marking around the neck of any animal | - |
| (verb) take into custody | Synonyms: apprehend, arrest, cop, nab, nail, pick up |
| (verb) furnish with a collar | - |
| (verb) seize by the neck or collar | - |
| collarbone | (noun) bone linking the scapula and sternum | Synonyms: clavicle |
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| collard | (noun) variety of kale having smooth leaves | - |
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| collards | (noun) kale that has smooth leaves | Synonyms: collard greens |
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| collarless | (adjective) without a collar | - |
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| collate | (verb) compare critically; of texts | - |
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| (verb) to assemble in proper sequence | - |
| collateral | (adjective) descended from a common ancestor but through different lines | Synonyms: indirect |
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| (adjective) situated or running side by side | - |
| (adjective) additional but secondary; auxiliary; | - |
| (adjective) occurring with or following as a consequence | Synonyms: accompanying, attendant, concomitant, consequent, ensuant, incidental, resultant, sequent |
| (adjective) serving to support or corroborate | Synonyms: confirmative, confirmatory, confirming, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying |
| (noun) a security pledged for the repayment of a loan | - |
| collateralize | (verb) pledge as a collateral | - |
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| collation | (noun) careful examination and comparison to note points of disagreement | - |
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| (noun) assembling in proper numerical or logical sequence | - |
| (noun) a light informal meal | Synonyms: bite, snack |
| collator | (noun) a machine that selects, merges and matches decks of punch cards. | - |
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| collembolan | (noun) any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or water | Synonyms: springtail |
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| columella | (noun) a small column (or structure resembling a column) that is a part of a plant or animal | - |
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| commonplace | (adjective) not challenging; dull and lacking excitement | Synonyms: humdrum, prosaic, unglamorous, unglamourous |
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| (adjective) repeated too often; overfamiliar through overuse | Synonyms: banal, hackneyed, old-hat, shopworn, stock, threadbare, timeworn, tired, trite, well-worn |
| (adjective) completely ordinary and unremarkable | - |
| (noun) a trite or obvious remark | Synonyms: banality, bromide, cliche, platitude |
| commonplaceness | (noun) ordinariness as a consequence of being frequent and commonplace | Synonyms: commonness, everydayness |
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| compilation | (noun) the act of compiling (as into a single book or file or list) | Synonyms: compiling |
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| (noun) something that is compiled (as into a single book or file) | Synonyms: digest |
| complacence | (noun) the feeling you have when you are satisfied with yourself | Synonyms: complacency, self-complacency, self-satisfaction |
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| complacency | (noun) the feeling you have when you are satisfied with yourself | Synonyms: complacence, self-complacency, self-satisfaction |
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| complacent | (adjective) contented to a fault with oneself or one's actions | Synonyms: self-complacent, self-satisfied |
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| complacently | (adverb) in a self-satisfied manner | - |
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| complain | (verb) express complaints, discontent, displeasure, or unhappiness | Synonyms: kick, kvetch, plain, quetch, sound off |
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| (verb) make a formal accusation; bring a formal charge | - |
| complainant | (noun) a person who brings an action in a court of law | Synonyms: plaintiff |
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| complainer | (noun) a person given to excessive complaints and crying and whining | Synonyms: bellyacher, crybaby, grumbler, moaner, sniveller, squawker, whiner |
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| complaining | (adjective) expressing pain or dissatisfaction of resentment | Synonyms: complaintive |
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| complainingly | (adverb) with complaints | - |
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| complaint | (noun) an expression of grievance or resentment | - |
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| (noun) (formerly) a loud cry (or repeated cries) of pain or rage or sorrow | - |
| (noun) (civil law) the first pleading of the plaintiff setting out the facts on which the claim for relief is based | - |
| (noun) (criminal law) a pleading describing some wrong or offense | Synonyms: charge |
| (noun) an often persistent bodily disorder or disease; a cause for complaining | Synonyms: ailment, ill |
| complaintive | (adjective) expressing pain or dissatisfaction of resentment | Synonyms: complaining |
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| complaisance | (noun) a disposition or tendency to yield to the will of others | Synonyms: compliance, compliancy, deference, obligingness |
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| complaisant | (adjective) showing a cheerful willingness to do favors for others | Synonyms: obliging |
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| conclave | (noun) a confidential or secret meeting | - |
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| condylar | (adjective) of or relating to or resembling a condyle | - |
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| confabulate | (verb) talk socially without exchanging too much information | Synonyms: chaffer, chat, chatter, chew the fat, chit-chat, chitchat, claver, confab, gossip, jaw, natter, shoot the breeze, visit |
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| (verb) have a conference in order to talk something over | Synonyms: confab, confer, consult |
| (verb) unconsciously replace fact with fantasy in one's memory | - |
| confabulation | (noun) (psychiatry) a plausible but imagined memory that fills in gaps in what is remembered | - |
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| (noun) an informal conversation | Synonyms: chat, confab, schmoose, schmooze |
| conflagrate | (verb) start to burn or burst into flames | Synonyms: catch fire, combust, erupt, ignite, take fire |
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| (verb) cause to start burning | Synonyms: enkindle, inflame, kindle |
| conflagration | (noun) a very intense and uncontrolled fire | Synonyms: inferno |
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| conflate | (verb) mix together different elements | Synonyms: blend, coalesce, combine, commingle, flux, fuse, immix, meld, merge, mix |
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| congelation | (noun) the process of congealing; solidification by (or as if by) freezing | Synonyms: congealment |
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| congratulate | (verb) say something to someone that expresses praise | Synonyms: compliment |
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| (verb) express congratulations | Synonyms: felicitate |
| (verb) pride or congratulate (oneself) for an achievement | Synonyms: preen |
| (verb) be proud of | Synonyms: plume, pride |
| congratulation | (noun) the act of acknowledging that someone has an occasion for celebration | Synonyms: felicitation |
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| (noun) (usually plural) an expression of pleasure at the success or good fortune of another | Synonyms: felicitation |
| congratulations | (noun) an expression of approval and commendation | Synonyms: extolment, kudos, praise |
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| congratulatory | (adjective) expressive of sympathetic pleasure or joy on account of someone's success or good fortune | Synonyms: gratulatory |
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| consolable | (adjective) able to be consoled | - |
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| consolation | (noun) the act of consoling; giving relief in affliction | Synonyms: comfort, solace |
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| (noun) the comfort you feel when consoled in times of disappointment | Synonyms: solace, solacement |
| consolatory | (adjective) affording comfort or solace | Synonyms: comforting, consoling |
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| constabulary | (noun) the force of policemen and officers | Synonyms: law, police, police force |
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| constellate | (verb) form a constellation or cluster | - |
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| (verb) come together as in a cluster or flock | Synonyms: clump, cluster, flock |
| (verb) scatter or intersperse like dots or studs | Synonyms: dot, stud |
| constellation | (noun) an arrangement of parts or elements | Synonyms: configuration |
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| (noun) a configuration of stars as seen from the earth | - |
| consular | (adjective) having to do with a consul or his office or duties | - |
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| consulate | (noun) diplomatic building that serves as the residence or workplace of a consul | - |
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| contemplate | (verb) think intently and at length, as for spiritual purposes | Synonyms: meditate, study |
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| (verb) reflect deeply on a subject | Synonyms: chew over, excogitate, meditate, mull, mull over, muse, ponder, reflect, ruminate, speculate, think over |
| (verb) consider as a possibility | - |
| (verb) look at thoughtfully; observe deep in thought | - |
| contemplation | (noun) a long and thoughtful observation | - |
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| (noun) a calm, lengthy, intent consideration | Synonyms: musing, reflection, reflexion, rumination, thoughtfulness |
| contemplative | (adjective) deeply or seriously thoughtful | Synonyms: brooding, broody, meditative, musing, pensive, pondering, reflective, ruminative |
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| (noun) a person devoted to the contemplative life | - |
| contemplativeness | (noun) deep serious thoughtfulness | Synonyms: meditativeness, pensiveness |
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| contralateral | (adjective) on or relating to the opposite side (of the body) | - |
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| contravallation | (noun) a fortification build around a sieged target by the besiegers to prevent attacks by the defenders. | - |
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| controllable | (adjective) capable of being controlled | Synonyms: governable |
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| coolant | (noun) a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another | - |
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| coplanar | (adjective) lying in the same plane | - |
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| copperplate | (noun) an engraving consisting of a smooth plate of copper that has been etched or engraved | Synonyms: copperplate engraving |
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| (noun) a print made from an engraved copperplate | - |
| (noun) a graceful style of handwriting based on the writing used on copperplate engravings | - |
| coprolalia | (noun) an uncontrollable use of obscene language; often accompanied by mental disorders | - |
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| copula | (noun) an equating verb (such as `be' or `become') that links the subject with the complement of a sentence | Synonyms: copulative, linking verb |
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| copular | (adjective) of or relating to a copula | - |
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| copulate | (verb) engage in sexual intercourse | Synonyms: couple, mate, pair |
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| copulation | (noun) sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur | Synonyms: carnal knowledge, coition, coitus, intercourse, relation, sex act, sexual congress, sexual intercourse, sexual relation |
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| copulative | (adjective) syntactically connecting sentences or elements of a sentence | - |
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| (noun) an equating verb (such as `be' or `become') that links the subject with the complement of a sentence | Synonyms: copula, linking verb |
| copulatory | (adjective) of or relating to coitus or copulation | Synonyms: coital |
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| corolla | (noun) (botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth | - |
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| corollary | (noun) (logic) an inference that follows directly from the proof of another proposition | - |
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| (noun) a practical consequence that follows naturally | - |
| coronilla | (noun) any of various plants of the genus Coronilla having purple or pink or yellow flowers in long axillary heads or umbels | - |
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| corpuscular | (adjective) of or relating to corpuscles | - |
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| correlate | (adjective) mutually related | Synonyms: correlated, correlative |
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| (noun) either of two or more related or complementary variables | Synonyms: correlative |
| (verb) bring into a mutual, complementary, or reciprocal relation | - |
| (verb) to bear a reciprocal or mutual relation | - |
| correlated | (adjective) mutually related | Synonyms: correlate, correlative |
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| correlation | (noun) a statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation) | Synonyms: coefficient of correlation, correlation coefficient |
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| (noun) a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other | Synonyms: correlational statistics |
| (noun) a reciprocal relation between two or more things | Synonyms: correlativity |
| correlational | (adjective) relating to or employing correlation | - |
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| correlative | (adjective) expressing a reciprocal or complementary relation | - |
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| (adjective) mutually related | Synonyms: correlate, correlated |
| (noun) either of two or more related or complementary variables | Synonyms: correlate |
| correlativity | (noun) a reciprocal relation between two or more things | Synonyms: correlation |
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| cosmolatry | (noun) the worship of the cosmos | - |
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| cosplay | (verb) wear a costume to resemble a character from some media especially anime | - |
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| cosplayer | (noun) Someone who wears a costume from a comic book or similar media | - |
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| cothromboplastin | (noun) a coagulation factor formed in the kidney under the influence of vitamin K | Synonyms: factor VII, proconvertin, stable factor |
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| counterbalance | (noun) a weight that balances another weight | Synonyms: balance, counterpoise, counterweight, equaliser, equalizer |
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| (noun) a compensating equivalent | Synonyms: offset |
| (noun) equality of distribution | Synonyms: balance, equilibrium, equipoise |
| (verb) oppose and mitigate the effects of by contrary actions | Synonyms: counteract, countervail, neutralize |
| (verb) contrast with equal weight or force | Synonyms: oppose |
| (verb) adjust for | Synonyms: compensate, correct, even off, even out, even up, make up |
| counterbalanced | (adjective) brought into equipoise by means of a weight or force that offsets another | Synonyms: counterpoised |
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| counterblast | (noun) a vigorous and unrestrained response | - |
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| counterclaim | (noun) a claim filed in opposition to another claim in a legal action | - |
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| (verb) set up a claim in opposition to a previous claim | - |
| counterplan | (noun) a plot intended to subvert another plot | Synonyms: counterplot |
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| counterplay | (noun) (chess) an attack that is intended to counter the opponent's advantage in another part of the board | Synonyms: counterattack |
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| courlan | (noun) wading bird of South America and Central America | Synonyms: Aramus guarauna |
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| crenelate | (verb) supply with battlements | Synonyms: crenel, crenellate |
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| crenelated | (adjective) having or resembling repeated square indentations like those in a battlement | Synonyms: battlemented, castellated, castled, embattled |
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