| accreditation | (noun) the act of granting credit or recognition (especially with respect to an educational institution that maintains suitable standards) | - |
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| accretion | (noun) (law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance) | - |
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| (noun) an increase by natural growth or addition | Synonyms: accumulation |
| (noun) (geology) an increase in land resulting from alluvial deposits or waterborne sediment | - |
| (noun) (biology) growth by addition as by the adhesion of parts or particles | - |
| (noun) (astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases | - |
| (noun) something contributing to growth or increase | - |
| accroides | (noun) an alcohol-soluble resin from Australian trees; used in varnishes and in manufacturing paper | Synonyms: acaroid resin, accaroid resin, accroides gum, accroides resin, gum accroides |
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| accrual | (noun) the act of accumulating | Synonyms: accruement, accumulation |
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| accruement | (noun) the act of accumulating | Synonyms: accrual, accumulation |
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| acre | (noun) a unit of area (4840 square yards) used in English-speaking countries | - |
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| acreage | (noun) an area of ground used for some particular purpose (such as building or farming) | Synonyms: land area |
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| acres | (noun) extensive landed property (especially in the country) retained by the owner for his own use | Synonyms: demesne, estate, land, landed estate |
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| acridid | (noun) grasshopper with short antennae | Synonyms: short-horned grasshopper |
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| acridity | (noun) extreme bitterness | Synonyms: acridness |
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| (noun) the quality of being sharply disagreeable in language or tone | Synonyms: acridness |
| (noun) having an acrid smell | - |
| acridness | (noun) extreme bitterness | Synonyms: acridity |
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| (noun) the quality of being sharply disagreeable in language or tone | Synonyms: acridity |
| acrimony | (noun) a rough and bitter manner | Synonyms: acerbity, bitterness, jaundice, tartness, thorniness |
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| acroanaesthesia | (noun) loss of sensation in the extremities | Synonyms: acroanesthesia |
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| acroanesthesia | (noun) loss of sensation in the extremities | Synonyms: acroanaesthesia |
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| acrobat | (noun) an athlete who performs acts requiring skill and agility and coordination | - |
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| acrobatics | (noun) the gymnastic moves of an acrobat | Synonyms: tumbling |
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| (noun) the performance of stunts while in flight in an aircraft | Synonyms: aerobatics, stunt flying, stunting |
| acrocarp | (noun) a moss in which the main axis is terminated by the archegonium (and hence the capsule) | Synonyms: acrocarpous moss |
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| acrocephaly | (noun) a congenital abnormality of the skull; the top of the skull assumes a cone shape | Synonyms: oxycephaly |
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| acrocyanosis | (noun) cyanosis of the extremities; can occur when a spasm of the blood vessels is caused by exposure to cold or by strong emotion | Synonyms: Raynaud's sign |
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| acrodont | (noun) an animal having teeth consolidated with the summit of the alveolar ridge without sockets | - |
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| acrogen | (noun) any flowerless plant such as a fern (pteridophyte) or moss (bryophyte) in which growth occurs only at the tip of the main stem | - |
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| acrolein | (noun) a pungent colorless unsaturated liquid aldehyde made from propene | Synonyms: propenal |
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| acromegalia | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegaly |
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| acromegaly | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegalia |
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| acromicria | (noun) abnormally small extremities (underdeveloped fingers and toes) | Synonyms: acromikria |
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| acromikria | (noun) abnormally small extremities (underdeveloped fingers and toes) | Synonyms: acromicria |
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| acromion | (noun) the outermost point of the spine of the shoulder blade | Synonyms: acromial process |
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| acromphalus | (noun) abnormal protrusion of the navel; sometimes the start of umbilical hernia | - |
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| acromyotonia | (noun) myotonia of the extremities only; causes spastic deformity of the hand or foot | - |
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| acronym | (noun) a word formed from the initial letters of the several words in the name and pronounced as one word | Synonyms: initialism |
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| acrophobia | (noun) a morbid fear of great heights | - |
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| acrophony | (noun) naming a letter of the alphabet by using a word whose initial sound is the sound represented by that letter | - |
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| acropolis | (noun) the citadel in ancient Greek towns | - |
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| acrosome | (noun) a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg | - |
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| acrostic | (noun) a puzzle where you fill a square grid with words reading the same down as across | Synonyms: word square |
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| (noun) verse in which certain letters such as the first in each line form a word or message | - |
| acrylamide | (noun) a white crystalline amide of propenoic acid can damage the nervous system and is carcinogenic in laboratory animals | - |
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| acrylate | (noun) a salt or ester of propenoic acid | Synonyms: propenoate |
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| acrylic | (noun) a synthetic fabric made from polyacrylonitrile | - |
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| (noun) used especially by artists | Synonyms: acrylic paint |
| (noun) a glassy thermoplastic; can be cast and molded or used in coatings and adhesives | Synonyms: acrylate resin, acrylic resin |
| (noun) polymerized from acrylonitrile | Synonyms: acrylic fiber |
| acrylonitrile | (noun) a colorless liquid unsaturated nitrile made from propene | Synonyms: propenonitrile, vinyl cyanide |
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| adhocracy | (noun) an organization with little or no structure | - |
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| aircraft | (noun) a vehicle that can fly | - |
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| aircraftman | (noun) a noncommissioned officer in the British Royal Air Force | Synonyms: aircraftsman |
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| aircraftsman | (noun) a noncommissioned officer in the British Royal Air Force | Synonyms: aircraftman |
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| aircrew | (noun) the crew of an aircraft | Synonyms: air crew |
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| aircrewman | (noun) a member of an aircrew | - |
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| airscrew | (noun) a propeller that rotates to push against air | Synonyms: airplane propeller, prop |
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| alacrity | (noun) liveliness and eagerness | Synonyms: briskness, smartness |
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| ambulacrum | (noun) one of the five areas on the undersurface of an echinoderm on which the tube feet are located | - |
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| antiaircraft | (noun) artillery designed to shoot upward at airplanes | Synonyms: ack-ack, ack-ack gun, antiaircraft gun, flack, flak, pom-pom |
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| antimicrobial | (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobic, disinfectant, germicide |
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| antimicrobic | (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobial, disinfectant, germicide |
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| apocryphalness | (noun) The property of being of doubtful authenticity, of lacking authority, or of not being regarded as canonical. | - |
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| (noun) The property of being of dubious veracity; of questionable accuracy or truthfulness. | - |
| aristocracy | (noun) a privileged class holding hereditary titles | Synonyms: nobility |
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| (noun) the most powerful members of a society | Synonyms: gentry |
| aristocrat | (noun) a member of the aristocracy | Synonyms: blue blood, patrician |
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| aristocratism | (noun) the principles, practices or characteristics of aristocracy. | - |
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| ascription | (noun) assigning to a cause or source | Synonyms: attribution |
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| (noun) assigning some quality or character to a person or thing | Synonyms: attribution |
| autocracy | (noun) a political theory favoring unlimited authority by a single individual | - |
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| (noun) a political system governed by a single individual | Synonyms: autarchy |
| autocrat | (noun) a cruel and oppressive dictator | Synonyms: despot, tyrant |
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| backscratcher | (noun) a long-handled scratcher for scratching your back | - |
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| (noun) someone who is willing to trade favors or services for mutual advantage | - |
| bittercress | (noun) any of various herbs of the genus Cardamine, having usually pinnate leaves and racemes of white, pink or purple flowers; cosmopolitan except Antarctic | Synonyms: bitter cress |
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| breadcrumb | (noun) crumb of bread; used especially for coating or thickening | - |
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| bureaucracy | (noun) nonelective government officials | Synonyms: bureaucratism |
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| (noun) a government that is administered primarily by bureaus that are staffed with nonelective officials | - |
| (noun) any organization in which action is obstructed by insistence on unnecessary procedures and red tape | - |
| bureaucrat | (noun) an official of a bureaucracy | Synonyms: administrative official |
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| bureaucratism | (noun) nonelective government officials | Synonyms: bureaucracy |
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| buttercrunch | (noun) lettuce with delicate and relatively crunchy leaves | - |
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| cancroid | (noun) the most common form of skin cancer | Synonyms: squamous cell carcinoma |
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| cecropia | (noun) North American silkworm moth; larvae feed on the leaves of forest trees | Synonyms: cecropia moth, Hyalophora cecropia |
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| chancre | (noun) a small hard painless nodule at the site of entry of a pathogen (as syphilis) | - |
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| chancroid | (noun) infectious venereal ulcer | - |
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| chloropicrin | (noun) a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas | Synonyms: nitrochloroform |
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| chylomicron | (noun) a microscopic particle of triglycerides produced in the intestines during digestion; in the bloodstream they release their fatty acids into the blood | - |
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| circumscription | (noun) the act of circumscribing | - |
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| cockcrow | (noun) the first light of day | Synonyms: aurora, break of day, break of the day, dawn, dawning, daybreak, dayspring, first light, morning, sunrise, sunup |
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| coldcream | (noun) a cream used cosmetically (mostly by women) for softening and cleaning the skin | Synonyms: cold cream, face cream, vanishing cream |
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| colicroot | (noun) any of several perennials of the genus Aletris having grasslike leaves and bitter roots reputed to cure colic | Synonyms: colic root, crow corn, star grass, unicorn root |
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| concrete | (noun) a strong hard building material composed of sand and gravel and cement and water | - |
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| concreteness | (noun) the quality of being concrete (not abstract) | - |
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| concretion | (noun) the union of diverse things into one body or form or group; the growing together of parts | Synonyms: coalescence, coalescency, coalition, conglutination |
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| (noun) an increase in the density of something | Synonyms: compaction, compression, densification |
| (noun) a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body | Synonyms: calculus |
| (noun) the formation of stonelike objects within a body organ (e.g., the kidneys) | - |
| concretism | (noun) a representation of an abstract idea in concrete terms | Synonyms: concrete representation |
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| conscript | (noun) someone who is drafted into military service | Synonyms: draftee, inductee |
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| conscription | (noun) compulsory military service | Synonyms: draft, muster, selective service |
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| consecration | (noun) (religion) sanctification of something by setting it apart (usually with religious rites) as dedicated to God | - |
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| (noun) a solemn commitment of your life or your time to some cherished purpose (to a service or a goal) | - |
| corkscrew | (noun) a bottle opener that pulls corks | Synonyms: bottle screw |
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| corncrake | (noun) common Eurasian rail that frequents grain fields | Synonyms: Crex crex, land rail |
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| corncrib | (noun) a crib for storing and drying ears of corn | - |
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| crab | (noun) a stroke of the oar that either misses the water or digs too deeply | - |
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| (noun) decapod having eyes on short stalks and a broad flattened carapace with a small abdomen folded under the thorax and pincers | - |
| (noun) a louse that infests the pubic region of the human body | Synonyms: crab louse, Phthirius pubis, pubic louse |
| (noun) the edible flesh of any of various crabs | Synonyms: crabmeat |
| (noun) a quarrelsome grouch | Synonyms: crabby person |
| crabapple | (noun) small sour apple; suitable for preserving | Synonyms: crab apple |
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| (noun) any of numerous wild apple trees usually with small acidic fruit | Synonyms: crab apple, wild apple |
| (noun) any of numerous varieties of crab apples cultivated for their small acidic (usually bright red) fruit used for preserves or as ornamentals for their blossoms | Synonyms: crab apple, cultivated crab apple |
| crabbedness | (noun) a disposition to be ill-tempered | Synonyms: crabbiness, crossness |
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| crabbiness | (noun) a disposition to be ill-tempered | Synonyms: crabbedness, crossness |
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| crabgrass | (noun) grasses with creeping stems that root freely; a pest in lawns | Synonyms: crab grass, finger grass |
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| crabmeat | (noun) the edible flesh of any of various crabs | Synonyms: crab |
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| crabs | (noun) infestation of the pubic hair by crab lice | Synonyms: pediculosis pubis |
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| crack | (noun) the act of cracking something | Synonyms: cracking, fracture |
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| (noun) a usually brief attempt | Synonyms: fling, go, offer, pass, whirl |
| (noun) a narrow opening | Synonyms: gap |
| (noun) a purified and potent form of cocaine that is smoked rather than snorted; highly addictive | Synonyms: crack cocaine, tornado |
| (noun) a blemish resulting from a break without complete separation of the parts | - |
| (noun) witty remark | Synonyms: quip, sally, wisecrack |
| (noun) a sudden sharp noise | Synonyms: cracking, snap |
| (noun) a long narrow cleft | Synonyms: cleft, crevice, fissure, scissure |
| (noun) a long narrow depression in a surface | Synonyms: chap, cranny, crevice, fissure |
| (noun) a chance to do something | Synonyms: shot |
| crackdown | (noun) severely repressive actions | - |
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| cracker | (noun) a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends | Synonyms: cracker bonbon, snapper |
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| (noun) firework consisting of a small explosive charge and fuse in a heavy paper casing | Synonyms: banger, firecracker |
| (noun) a thin crisp wafer made of flour and water with or without leavening and shortening; unsweetened or semisweet | - |
| (noun) a poor White person in the southern United States | Synonyms: redneck |
| (noun) a programmer who cracks (gains unauthorized access to) computers, typically to do malicious things | - |
| crackerberry | (noun) creeping perennial herb distinguished by red berries and clustered leaf whorls at the tips of shoots; Greenland to Alaska | Synonyms: bunchberry, Cornus canadensis, dwarf cornel, pudding berry |
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| crackerjack | (noun) something excellent of its kind | Synonyms: jimdandy, jimhickey |
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| (noun) someone excellent of their kind | Synonyms: jimdandy, jimhickey |
| cracking | (noun) the act of cracking something | Synonyms: crack, fracture |
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| (noun) a sudden sharp noise | Synonyms: crack, snap |
| (noun) the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process) | - |
| crackle | (noun) glazed china with a network of fine cracks on the surface | Synonyms: crackle china, crackleware |
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| (noun) the sharp sound of snapping noises | Synonyms: crackling, crepitation |
| crackleware | (noun) glazed china with a network of fine cracks on the surface | Synonyms: crackle, crackle china |
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