| abase | (verb) cause to feel shame; hurt the pride of | Synonyms: chagrin, humble, humiliate, mortify |
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| abasement | (noun) depriving one of self-esteem | Synonyms: humiliation |
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| (noun) a low or downcast state | Synonyms: abjection, degradation |
| abrase | (verb) wear away | Synonyms: abrade, corrade, rub down, rub off |
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| aminopherase | (noun) a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound) | Synonyms: aminotransferase, transaminase |
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| aminotransferase | (noun) a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound) | Synonyms: aminopherase, transaminase |
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| amylase | (noun) any of a group of proteins found in saliva and pancreatic juice and parts of plants; help convert starch to sugar | - |
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| anaphase | (noun) the stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle | - |
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| anticholinesterase | (noun) a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect | - |
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| appease | (verb) make peace with | Synonyms: propitiate |
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| (verb) overcome or allay | Synonyms: quell, stay |
| (verb) cause to be more favorably inclined; gain the good will of | Synonyms: assuage, conciliate, gentle, gruntle, lenify, mollify, pacify, placate |
| appeasement | (noun) the act of appeasing (as by acceding to the demands of) | Synonyms: calming |
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| appeaser | (noun) someone who tries to bring peace by acceding to demands | - |
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| asea | (adverb) in the direction of the sea | Synonyms: seaward, seawards |
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| asepsis | (noun) the process of inhibiting the growth and multiplication of microorganisms | Synonyms: antisepsis |
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| (noun) (of non-living objects) the state of being free of pathogenic organisms | Synonyms: antisepsis, sterileness, sterility |
| aseptic | (adjective) free of or using methods to keep free of pathological microorganisms | Synonyms: sterile |
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| asexual | (adjective) not having or involving sex | Synonyms: nonsexual |
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| asexuality | (noun) having no evident sex or sex organs | Synonyms: sexlessness |
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| asexually | (adverb) in an asexual manner | - |
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| asparaginase | (noun) antineoplastic drug (trade name Elspar) sometimes used to treat lymphoblastic leukemia | Synonyms: Elspar |
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| base | (adjective) serving as or forming a base | Synonyms: basal |
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| (adjective) debased; not genuine | - |
| (adjective) having or showing an ignoble lack of honor or morality | Synonyms: mean, meanspirited |
| (adjective) illegitimate | Synonyms: baseborn |
| (adjective) (used of metals) consisting of or alloyed with inferior metal | - |
| (adjective) of low birth or station (`base' is archaic in this sense) | Synonyms: baseborn, humble, lowly |
| (adjective) not adhering to ethical or moral principles | Synonyms: immoral |
| (noun) a support or foundation | Synonyms: pedestal, stand |
| (noun) lowest support of a structure | Synonyms: foot, foundation, fundament, groundwork, substructure, understructure |
| (noun) a place that the runner must touch before scoring | Synonyms: bag |
| (noun) (electronics) the part of a transistor that separates the emitter from the collector | - |
| (noun) installation from which a military force initiates operations | Synonyms: base of operations |
| (noun) a flat bottom on which something is intended to sit | - |
| (noun) the stock of basic facilities and capital equipment needed for the functioning of a country or area | Synonyms: infrastructure |
| (noun) the principal ingredient of a mixture | - |
| (noun) the fundamental assumptions from which something is begun or developed or calculated or explained | Synonyms: basis, cornerstone, foundation, fundament, groundwork |
| (noun) (linguistics) the form of a word after all affixes are removed | Synonyms: radical, root, root word, stem, theme |
| (noun) a lower limit | Synonyms: floor |
| (noun) (anatomy) the part of an organ nearest its point of attachment | - |
| (noun) the place where you are stationed and from which missions start and end | Synonyms: home |
| (noun) the bottom or lowest part | - |
| (noun) (numeration system) the positive integer that is equivalent to one in the next higher counting place | Synonyms: radix |
| (noun) the most important or necessary part of something | Synonyms: basis |
| (noun) the bottom side of a geometric figure from which the altitude can be constructed | - |
| (noun) any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water | Synonyms: alkali |
| (noun) a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA) | Synonyms: nucleotide |
| (verb) use as a basis for; found on | Synonyms: establish, found, ground |
| (verb) use (purified cocaine) by burning it and inhaling the fumes | Synonyms: free-base |
| (verb) situate as a center of operations | - |
| baseball | (noun) a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs | Synonyms: ball, baseball game |
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| (noun) a ball used in playing baseball | - |
| baseboard | (noun) a molding covering the joint formed by a wall and the floor | Synonyms: mopboard, skirting board |
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| baseborn | (adjective) illegitimate | Synonyms: base |
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| (adjective) of low birth or station (`base' is archaic in this sense) | Synonyms: base, humble, lowly |
| based | (adjective) having a base of operations (often used as a combining form) | - |
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| (adjective) having a base | - |
| baseless | (adjective) without a basis in reason or fact | Synonyms: groundless, idle, unfounded, unwarranted, wild |
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| baseline | (noun) the lines a baseball player must follow while running the bases | - |
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| (noun) the back line bounding each end of a tennis or handball court; when serving the server must not step over this line | Synonyms: service line |
| (noun) an imaginary line or standard by which things are measured or compared | - |
| basely | (adverb) in a despicable, ignoble manner | Synonyms: meanly, scurvily |
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| basement | (noun) the lowermost portion of a structure partly or wholly below ground level; often used for storage | Synonyms: cellar |
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| (noun) the ground floor facade or interior in Renaissance architecture | - |
| baseness | (noun) unworthiness by virtue of lacking higher values | Synonyms: contemptibility, despicability, despicableness, sordidness |
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| basenji | (noun) small smooth-haired breed of African origin having a tightly curled tail and the inability to bark | - |
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| biased | (adjective) favoring one person or side over another | Synonyms: colored, coloured, one-sided, slanted |
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| blase | (adjective) very sophisticated especially because of surfeit; versed in the ways of the world | Synonyms: worldly |
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| (adjective) nonchalantly unconcerned | - |
| (adjective) uninterested because of frequent exposure or indulgence | Synonyms: bored |
| bookcase | (noun) a piece of furniture with shelves for storing books | - |
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| braincase | (noun) the part of the skull that encloses the brain | Synonyms: brainpan, cranium |
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| briefcase | (noun) a case with a handle; for carrying papers or files or books | - |
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| carcase | (noun) the dead body of an animal especially one slaughtered and dressed for food | Synonyms: carcass |
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| cardcase | (noun) a small case for carrying business cards | - |
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| case | (noun) a comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy | Synonyms: causa, cause, lawsuit, suit |
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| (noun) a portable container for carrying several objects | - |
| (noun) a glass container used to store and display items in a shop or museum or home | Synonyms: display case, showcase, vitrine |
| (noun) bed linen consisting of a cover for a pillow | Synonyms: pillow slip, pillowcase, slip |
| (noun) (printing) the receptacle in which a compositor has his type, which is divided into compartments for the different letters, spaces, or numbers | Synonyms: compositor's case, typesetter's case |
| (noun) the housing or outer covering of something | Synonyms: casing, shell |
| (noun) the enclosing frame around a door or window opening | Synonyms: casing |
| (noun) an enveloping structure or covering enclosing an animal or plant organ or part | Synonyms: sheath |
| (noun) the actual state of things | - |
| (noun) nouns or pronouns or adjectives (often marked by inflection) related in some way to other words in a sentence | Synonyms: grammatical case |
| (noun) a statement of facts and reasons used to support an argument | - |
| (noun) a problem requiring investigation | - |
| (noun) a specific size and style of type within a type family | Synonyms: face, font, fount, typeface |
| (noun) an occurrence of something | Synonyms: example, instance |
| (noun) a person who is subjected to experimental or other observational procedures; someone who is an object of investigation | Synonyms: guinea pig, subject |
| (noun) a person requiring professional services | - |
| (noun) a person of a specified kind (usually with many eccentricities) | Synonyms: character, eccentric, type |
| (noun) the quantity contained in a case | Synonyms: caseful |
| (noun) a special set of circumstances | Synonyms: event |
| (noun) a specific state of mind that is temporary | - |
| (verb) enclose in, or as if in, a case | Synonyms: encase, incase |
| (verb) look over, usually with the intention to rob | - |
| caseate | (verb) become cheeselike | - |
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| (verb) turn into cheese | - |
| casebook | (adjective) according to or characteristic of a casebook or textbook; typical | Synonyms: textbook |
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| (noun) a book in which detailed written records of a case are kept and which are a source of information for subsequent work | - |
| cased | (adjective) enclosed in a case | - |
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| (adjective) covered or protected with or as if with a case | Synonyms: encased, incased |
| caseful | (noun) the quantity contained in a case | Synonyms: case |
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| casein | (noun) a water-base paint made with a protein precipitated from milk | Synonyms: casein paint |
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| (noun) a milk protein used in making e.g. plastics and adhesives | - |
| casement | (noun) a window sash that is hinged (usually on one side) | - |
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| caseous | (adjective) of damaged or necrotic tissue; cheeselike | - |
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| casern | (noun) military barracks in a garrison town | - |
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| casework | (noun) close sociological study of a maladjusted person or family for diagnosis and treatment | - |
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| caseworker | (noun) someone employed to provide social services (especially to the disadvantaged) | Synonyms: social worker, welfare worker |
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| caseworm | (noun) insect larva that constructs a protective case around its body | - |
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| caspase | (noun) any of a group of proteases that mediate apoptosis | - |
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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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| catchphrase | (noun) a phrase that has become a catchword | Synonyms: catch phrase |
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| cease | (noun) (`cease' is a noun only in the phrase `without cease') end | - |
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| (verb) put an end to a state or an activity | Synonyms: discontinue, give up, lay off, quit, stop |
| (verb) have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical | Synonyms: end, finish, stop, terminate |
| ceaseless | (adjective) uninterrupted in time and indefinitely long continuing | Synonyms: constant, incessant, never-ending, perpetual, unceasing, unremitting |
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| ceaselessly | (adverb) with unflagging resolve | Synonyms: continuously, endlessly, incessantly, unceasingly, unendingly |
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| ceaselessness | (noun) the quality of something that continues without end or interruption | Synonyms: continuousness, incessancy, incessantness |
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| chase | (noun) the act of pursuing in an effort to overtake or capture | Synonyms: following, pursual, pursuit |
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| (noun) a rectangular metal frame used in letterpress printing to hold together the pages or columns of composed type that are printed at one time | - |
| (verb) cut a groove into | - |
| (verb) cut a furrow into a columns | Synonyms: chamfer, furrow |
| (verb) go after with the intent to catch | Synonyms: chase after, dog, give chase, go after, tag, tail, track, trail |
| (verb) pursue someone sexually or romantically | Synonyms: chase after |
| chased | (noun) a person who is being chased | Synonyms: pursued |
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| chaser | (noun) a drink to follow immediately after another drink | - |
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| (noun) a person who is pursuing and trying to overtake or capture | Synonyms: pursuer |
| cholinesterase | (noun) an enzyme that hydrolyses acetylcholine (into choline and acetic acid) | - |
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| chrysoprase | (noun) a green variety of chalcedony valued as a gemstone | - |
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| coagulase | (noun) an enzyme that induces coagulation | - |
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| cocarboxylase | (noun) a coenzyme important in respiration in the Krebs cycle | Synonyms: thiamine pyrophosphate |
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| collagenase | (noun) any enzyme that catalyzes the hydrolysis of collagen and gelatin | - |
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| convertase | (noun) any of several enzymes that convert a compound into smaller, biologically-active compounds. | - |
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| copasetic | (adjective) completely satisfactory | Synonyms: copacetic, copesetic, copesettic |
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| crankcase | (noun) housing for a crankshaft | - |
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| crease | (noun) a Malayan dagger with a wavy blade | Synonyms: creese, kris |
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| (noun) a slight depression or fold in the smoothness of a surface | Synonyms: crinkle, furrow, line, seam, wrinkle |
| (noun) an angular or rounded shape made by folding | Synonyms: bend, crimp, flexure, fold, plication |
| (verb) become wrinkled or crumpled or creased | Synonyms: crinkle, crumple, rumple, wrinkle |
| (verb) make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic | Synonyms: crinkle, crisp, ruckle, scrunch, scrunch up, wrinkle |
| (verb) make wrinkled or creased | Synonyms: furrow, wrinkle |
| (verb) scrape gently | Synonyms: graze, rake |
| creaseless | (adjective) used especially of fabrics | Synonyms: uncreased |
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| creaseproof | (adjective) of fabric that does not wrinkle easily | Synonyms: crease-resistant, wrinkle-resistant, wrinkleproof |
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| cyclooxygenase | (noun) either of two related enzymes that control the production of prostaglandins and are blocked by aspirin | Synonyms: Cox |
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| database | (noun) an organized body of related information | - |
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| debase | (verb) lower in value by increasing the base-metal content | Synonyms: alloy |
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| (verb) corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones | Synonyms: adulterate, dilute, load, stretch |
| (verb) corrupt morally or by intemperance or sensuality | Synonyms: corrupt, debauch, demoralise, demoralize, deprave, misdirect, pervert, profane, subvert, vitiate |
| debased | (adjective) ruined in character or quality | Synonyms: corrupted, vitiated |
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| (adjective) mixed with impurities | Synonyms: adulterate, adulterated |
| (adjective) lowered in value | Synonyms: degraded, devalued |
| debasement | (noun) changing to a lower state (a less respected state) | Synonyms: degradation |
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| (noun) being mixed with extraneous material; the product of adulterating | Synonyms: adulteration |
| debaser | (noun) a person who lowers the quality or character or value (as by adding cheaper metal to coins) | Synonyms: degrader |
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| decarboxylase | (noun) any of the enzymes that hydrolize the carboxyl group | - |
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| decease | (noun) the event of dying or departure from life | Synonyms: death, expiry |
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| (verb) pass from physical life and lose all bodily attributes and functions necessary to sustain life | Synonyms: buy the farm, cash in one's chips, choke, conk, croak, die, drop dead, exit, expire, give-up the ghost, go, kick the bucket, pass, pass away, perish, pop off, snuff it |
| deceased | (adjective) dead | Synonyms: asleep, at peace, at rest, departed, gone |
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| (noun) someone who is no longer alive | Synonyms: dead person, dead soul, deceased person, decedent, departed |
| decrease | (noun) the act of decreasing or reducing something | Synonyms: diminution, reduction, step-down |
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| (noun) the amount by which something decreases | Synonyms: decrement |
| (noun) a change downward | Synonyms: drop-off, lessening |
| (noun) a process of becoming smaller or shorter | Synonyms: decrement |
| (verb) decrease in size, extent, or range | Synonyms: diminish, fall, lessen |
| (verb) make become smaller | Synonyms: lessen, minify |
| decreased | (adjective) made less in size or amount or degree | Synonyms: reduced |
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| degrease | (verb) remove grease or oil from (a pan) | - |
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| degreaser | (noun) a chemical substance that dissolves water-insoluble substances, such as greases and oils. | - |
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| disaccharidase | (noun) an enzyme that catalyzes the hydrolysis of disaccharides into monosaccharides | - |
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| discase | (verb) get undressed | Synonyms: disrobe, peel, strip, strip down, uncase, unclothe, undress |
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| disease | (noun) an impairment of health or a condition of abnormal functioning | - |
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| diseased | (adjective) caused by or altered by or manifesting disease or pathology | Synonyms: morbid, pathologic, pathological |
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| displease | (verb) give displeasure to | - |
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| displeased | (adjective) not pleased; experiencing or manifesting displeasure | - |
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| doorcase | (noun) the frame that supports a door | Synonyms: doorframe |
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| ease | (noun) freedom from activity (work or strain or responsibility) | Synonyms: relaxation, repose, rest |
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| (noun) freedom from difficulty or hardship or effort | Synonyms: easiness, simpleness, simplicity |
| (noun) freedom from constraint or embarrassment | Synonyms: informality |
| (noun) a freedom from financial difficulty that promotes a comfortable state | Synonyms: comfort |
| (noun) the condition of being comfortable or relieved (especially after being relieved of distress) | Synonyms: relief |
| (verb) lessen pain or discomfort; alleviate | Synonyms: comfort |
| (verb) make easier | Synonyms: alleviate, facilitate |
| (verb) lessen the intensity of or calm | Synonyms: allay, relieve, still |
| (verb) move gently or carefully | - |
| eased | (adjective) (of pain or sorrow) made easier to bear | Synonyms: alleviated, relieved |
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| easel | (noun) an upright tripod for displaying something (usually an artist's canvas) | - |
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| easement | (noun) the act of reducing something unpleasant (as pain or annoyance) | Synonyms: alleviation, easing, relief |
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| (noun) (law) the privilege of using something that is not your own (as using another's land as a right of way to your own land) | - |
| elastase | (noun) a pancreatic enzyme that catalyzes the hydrolysis of elastin | - |
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| encase | (verb) enclose in, or as if in, a case | Synonyms: case, incase |
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| encased | (adjective) covered or protected with or as if with a case | Synonyms: cased, incased |
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| encasement | (noun) the act of enclosing something in a case | Synonyms: incasement |
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| endonuclease | (noun) a nuclease that cleaves nucleic acids at interior bonds and so produces fragments of various sizes | - |
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| enterokinase | (noun) enzyme in the intestinal juice that converts inactive trypsinogen into active trypsin | - |
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| erase | (verb) remove from memory or existence | Synonyms: wipe out |
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| (verb) wipe out digitally or magnetically recorded information | Synonyms: delete |
| (verb) remove by or as if by rubbing or erasing | Synonyms: efface, rub out, score out, wipe off |