| abortifacient | (noun) a drug (or other chemical agent) that causes abortion | Synonyms: aborticide, abortion-inducing drug |
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| artefact | (noun) a man-made object taken as a whole | Synonyms: artifact |
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| artifact | (noun) a man-made object taken as a whole | Synonyms: artefact |
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| benefaction | (noun) an act intending or showing kindness and good will | Synonyms: benevolence |
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| (noun) a contribution of money or assistance | - |
| benefactor | (noun) a person who helps people or institutions (especially with financial help) | Synonyms: helper |
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| benefactress | (noun) a woman benefactor | - |
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| blackface | (noun) the makeup (usually burnt cork) used by a performer in order to imitate a Negro | - |
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| boldface | (noun) a typeface with thick heavy lines | Synonyms: bold, bold face |
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| boniface | (noun) the owner or manager of an inn | Synonyms: host, innkeeper |
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| calefaction | (noun) the property of being warming | Synonyms: incalescence |
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| coalface | (noun) the part of a coal seam that is being cut | - |
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| cofactor | (noun) a substance (as a coenzyme) that must join with another to produce a given result | - |
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| counterfactuality | (noun) the quality of being contrary to fact | - |
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| defacement | (noun) the act of damaging the appearance or surface of something | Synonyms: disfiguration, disfigurement, mutilation |
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| dissatisfaction | (noun) the feeling of being displeased and discontent | - |
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| effacement | (noun) withdrawing into the background; making yourself inconspicuous | Synonyms: self-effacement |
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| (noun) shortening of the uterine cervix and thinning of its walls as it is dilated during labor | - |
| facade | (noun) the face or front of a building | Synonyms: frontage, frontal |
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| (noun) a showy misrepresentation intended to conceal something unpleasant | Synonyms: window dressing |
| face | (noun) a vertical surface of a building or cliff | - |
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| (noun) the side upon which the use of a thing depends (usually the most prominent surface of an object) | - |
| (noun) the striking or working surface of an implement | - |
| (noun) the general outward appearance of something | - |
| (noun) status in the eyes of others | - |
| (noun) impudent aggressiveness | Synonyms: boldness, brass, cheek, nerve |
| (noun) the feelings expressed on a person's face | Synonyms: aspect, expression, facial expression, look |
| (noun) the front of the human head from the forehead to the chin and ear to ear | Synonyms: human face |
| (noun) the part of an animal corresponding to the human face | - |
| (noun) a specific size and style of type within a type family | Synonyms: case, font, fount, typeface |
| (noun) a contorted facial expression | Synonyms: grimace |
| (noun) a surface forming part of the outside of an object | Synonyms: side |
| (noun) a part of a person that is used to refer to a person | - |
| facelift | (noun) plastic surgery to remove wrinkles and other signs of aging from your face; an incision is made near the hair line and skin is pulled back and excess tissue is excised | Synonyms: cosmetic surgery, face lift, face lifting, lift, nip and tuck, rhytidectomy, rhytidoplasty |
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| (noun) a renovation that improves the outward appearance (as of a building) but usually does not involve major changes | Synonyms: face lift, face lifting |
| facepalm | (noun) the act of putting your hand to cover your face to show disappointment or despair | - |
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| faceplate | (noun) a protective covering for the front of a machine or device (as a door lock or computer component) | - |
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| facer | (noun) (a dated Briticism) a serious difficulty with which one is suddenly faced | - |
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| facet | (noun) a distinct feature or element in a problem | Synonyms: aspect |
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| (noun) a smooth surface (as of a bone or cut gemstone) | - |
| facetiousness | (noun) playful humor | - |
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| facia | (noun) a sheet or band of fibrous connective tissue separating or binding together muscles and organs etc | Synonyms: fascia |
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| facial | (noun) care for the face that usually involves cleansing and massage and the application of cosmetic creams | - |
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| (noun) cranial nerve that supplies facial muscles | Synonyms: facial nerve, nervus facialis, seventh cranial nerve |
| facilitation | (noun) act of assisting or making easier the progress or improvement of something | - |
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| (noun) (neurophysiology) phenomenon that occurs when two or more neural impulses that alone are not enough to trigger a response in a neuron combine to trigger an action potential | - |
| (noun) the condition of being made easy (or easier) | - |
| facilitator | (noun) someone who makes progress easier | - |
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| facility | (noun) a service that an organization or a piece of equipment offers you | - |
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| (noun) something designed and created to serve a particular function and to afford a particular convenience or service | - |
| (noun) a building or place that provides a particular service or is used for a particular industry | Synonyms: installation |
| (noun) a natural effortlessness | Synonyms: readiness |
| (noun) skillful performance or ability without difficulty | Synonyms: adeptness, adroitness, deftness, quickness |
| facing | (noun) providing something with a surface of a different material | Synonyms: lining |
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| (noun) a protective covering that protects the outside of a building | Synonyms: cladding |
| (noun) a lining applied to the edge of a garment for ornamentation or strengthening | - |
| (noun) an ornamental coating to a building | Synonyms: veneer |
| facsimile | (noun) duplicator that transmits the copy by wire or radio | Synonyms: facsimile machine, fax |
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| (noun) an exact copy or reproduction | Synonyms: autotype |
| fact | (noun) a piece of information about circumstances that exist or events that have occurred | - |
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| (noun) a concept whose truth can be proved | - |
| (noun) a statement or assertion of verified information about something that is the case or has happened | - |
| (noun) an event known to have happened or something known to have existed | - |
| faction | (noun) a dissenting clique | Synonyms: sect |
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| (noun) a clique (often secret) that seeks power usually through intrigue | Synonyms: cabal, camarilla, junto |
| factoid | (noun) a brief (usually one sentence and usually trivial) news item | - |
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| (noun) something resembling a fact; unverified (often invented) information that is given credibility because it appeared in print | - |
| factor | (noun) (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity | Synonyms: cistron, gene |
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| (noun) an abstract part of something | Synonyms: component, constituent, element, ingredient |
| (noun) an independent variable in statistics | - |
| (noun) anything that contributes causally to a result | - |
| (noun) a businessman who buys or sells for another in exchange for a commission | Synonyms: agent, broker |
| (noun) one of two or more integers that can be exactly divided into another integer | Synonyms: divisor |
| (noun) any of the numbers (or symbols) that form a product when multiplied together | - |
| factorial | (noun) the product of all the integers up to and including a given integer | - |
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| factoring | (noun) (mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression | Synonyms: factorisation, factorization |
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| factorisation | (noun) (mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression | Synonyms: factoring, factorization |
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| factorization | (noun) (mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression | Synonyms: factoring, factorisation |
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| factory | (noun) a plant consisting of one or more buildings with facilities for manufacturing | Synonyms: manufactory, manufacturing plant, mill |
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| factotum | (noun) a servant employed to do a variety of jobs | - |
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| factuality | (noun) the quality of being actual or based on fact | Synonyms: factualness |
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| factualness | (noun) the quality of being actual or based on fact | Synonyms: factuality |
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| facula | (noun) a large bright spot on the sun's photosphere occurring most frequently in the vicinity of sunspots | Synonyms: solar facula |
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| (noun) a bright spot on a planet | - |
| faculty | (noun) one of the inherent cognitive or perceptual powers of the mind | Synonyms: mental faculty, module |
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| (noun) the body of teachers and administrators at a school | Synonyms: staff |
| ineffaceability | (noun) The quality of being difficult to delete, remove, wash away, blot out, or efface. | Synonyms: indelibility |
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| interface | (noun) (chemistry) a surface forming a common boundary between two things (two objects or liquids or chemical phases) | - |
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| (noun) (computer science) computer circuit consisting of the hardware and associated circuitry that links one device with another (especially a computer and a hard disk drive or other peripherals) | Synonyms: port |
| (noun) the overlap where two theories or phenomena affect each other or have links with each other | - |
| (noun) (computer science) a program that controls a display for the user (usually on a computer monitor) and that allows the user to interact with the system | Synonyms: user interface |
| liquefaction | (noun) the conversion of a solid or a gas into a liquid | - |
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| malefactor | (noun) someone who has committed a crime or has been legally convicted of a crime | Synonyms: criminal, crook, felon, outlaw |
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| manufactory | (noun) a plant consisting of one or more buildings with facilities for manufacturing | Synonyms: factory, manufacturing plant, mill |
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| manufacture | (noun) the organized action of making of goods and services for sale | Synonyms: industry |
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| (noun) the act of making something (a product) from raw materials | Synonyms: fabrication, manufacturing |
| manufacturer | (noun) a business engaged in manufacturing some product | Synonyms: maker, manufacturing business |
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| (noun) someone who manufactures something | Synonyms: producer |
| manufacturing | (noun) the act of making something (a product) from raw materials | Synonyms: fabrication, manufacture |
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| olfaction | (noun) the faculty that enables us to distinguish scents | Synonyms: olfactory modality, sense of smell, smell |
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| olfactology | (noun) the scientific study of smells or of the sense of smell. | - |
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| paleface | (noun) (slang) a derogatory term for a white person (supposedly used by North American Indians) | - |
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| petrifaction | (noun) a rock created by petrifaction; an organic object infiltrated with mineral matter and preserved in its original form | - |
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| (noun) the process of turning some plant material into stone by infiltration with water carrying mineral particles without changing the original shape | Synonyms: petrification |
| preface | (noun) a short introductory essay preceding the text of a book | Synonyms: foreword, prolusion |
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| putrefaction | (noun) moral perversion; impairment of virtue and moral principles | Synonyms: corruption, degeneracy, depravation, depravity |
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| (noun) (biology) the process of decay caused by bacterial or fungal action | Synonyms: breakdown, decomposition, rot, rotting |
| (noun) a state of decay usually accompanied by an offensive odor | Synonyms: rot |
| rarefaction | (noun) a decrease in the density of something | - |
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| rubefacient | (noun) a medicine for external application that produces redness of the skin | - |
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| satisfaction | (noun) act of fulfilling a desire or need or appetite | - |
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| (noun) the contentment one feels when one has fulfilled a desire, need, or expectation | - |
| (noun) compensation for a wrong | Synonyms: atonement, expiation |
| (noun) (law) the payment of a debt or fulfillment of an obligation | - |
| (noun) state of being gratified or satisfied | Synonyms: gratification |
| satisfactoriness | (noun) the quality of giving satisfaction sufficient to meet a demand or requirement | - |
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| shamefacedness | (noun) feeling embarrassed about yourself | Synonyms: sheepishness |
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| stoneface | (noun) any plant of the genus Lithops native to Africa having solitary yellow or white flowers and thick leaves that resemble stones | Synonyms: flowering stone, lithops, living stone, stone-face, stone life face, stone plant |
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| stupefaction | (noun) the action of stupefying; making dull or lethargic | - |
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| (noun) marginal consciousness | Synonyms: grogginess, semiconsciousness, stupor |
| (noun) a feeling of stupefied astonishment | - |
| sulfacetamide | (noun) a topical sulfonamide (trade name Sulamyd) used to treat eye infections | Synonyms: Sulamyd |
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| surface | (noun) the outer boundary of an artifact or a material layer constituting or resembling such a boundary | - |
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| (noun) a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight | Synonyms: aerofoil, airfoil, control surface |
| (noun) a superficial aspect as opposed to the real nature of something | - |
| (noun) information that has become public | Synonyms: open |
| (noun) the extended two-dimensional outer boundary of a three-dimensional object | - |
| (noun) the outermost level of the land or sea | Synonyms: Earth's surface |
| surfacing | (noun) emerging to the surface and becoming apparent | - |
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| surfactant | (noun) a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved | Synonyms: surface-active agent, wetter, wetting agent |
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| tumefaction | (noun) the process of tumefying; the organic process whereby tissue becomes swollen by the accumulation of fluid within it | - |
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| typeface | (noun) a specific size and style of type within a type family | Synonyms: case, face, font, fount |
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| undersurface | (noun) the lower side of anything | Synonyms: bottom, underside |
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| unsatisfactoriness | (noun) the quality of being inadequate or unsuitable | - |
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| whiteface | (noun) hardy English breed of cattle raised extensively in United States | Synonyms: Hereford |
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| (noun) a clown whose face is covered with white make-up | - |