| editorship | (noun) the position of editor | - |
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| educator | (noun) someone who educates young people | Synonyms: pedagog, pedagogue |
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| effector | (noun) an organ (a gland or muscle) that becomes active in response to nerve impulses | - |
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| (noun) a nerve fiber that terminates on a muscle or gland and stimulates contraction or secretion | - |
| (noun) one who brings about a result or event; one who accomplishes a purpose | Synonyms: effecter |
| ejaculator | (noun) a speaker who utters a sudden exclamation | - |
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| (noun) a man who ejaculates semen | - |
| ejector | (noun) a mechanism in a firearm that ejects the empty shell case after firing | Synonyms: cartridge ejector |
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| (noun) An injector, ejector, steam ejector, steam injector, eductor-jet pump or thermocompressor is a type of pump. | Synonyms: eductor-jet pump, injector, steam ejector, steam injector, thermocompressor |
| (noun) a person who ousts or supplants someone else | Synonyms: ouster |
| elector | (noun) a citizen who has a legal right to vote | Synonyms: voter |
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| electorate | (noun) the body of enfranchised citizens; those qualified to vote | - |
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| elevator | (noun) lifting device consisting of a platform or cage that is raised and lowered mechanically in a vertical shaft in order to move people from one floor to another in a building | Synonyms: lift |
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| (noun) the airfoil on the tailplane of an aircraft that makes it ascend or descend | - |
| eliminator | (noun) an agent that eliminates something | - |
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| emancipator | (noun) someone who frees others from bondage | Synonyms: manumitter |
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| emptor | (noun) a person who buys | Synonyms: buyer, purchaser, vendee |
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| emulator | (noun) someone who copies the words or behavior of another | Synonyms: ape, aper, copycat, imitator |
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| emunctorium | (noun) a white linen cloth which is used to wipe the chalice after each communicant partakes. | Synonyms: purificator, purificatorium |
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| enteroceptor | (noun) any receptor that responds to stimuli inside the body | Synonyms: interoceptor |
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| enumerator | (noun) someone who collects census data by visiting individual homes | Synonyms: census taker |
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| eoraptor | (noun) a theropod dinosaur of the genus Eoraptor | - |
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| epilator | (noun) a cosmetic for temporary removal of undesired hair | Synonyms: depilator, depilatory |
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| equator | (noun) an imaginary line around the Earth forming the great circle that is equidistant from the north and south poles | - |
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| (noun) a circle dividing a sphere or other surface into two usually equal and symmetrical parts | - |
| equatorial | (noun) a telescope whose mounting has only two axes of motion, one parallel to the Earth's axis and the other one at right angles to it | - |
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| equivocator | (noun) a respondent who avoids giving a clear direct answer | Synonyms: hedger, tergiversator |
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| eradicator | (noun) someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects) | Synonyms: exterminator, terminator |
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| escalator | (noun) a stairway whose steps move continuously on a circulating belt | Synonyms: moving staircase, moving stairway |
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| (noun) a clause in a contract that provides for an increase or a decrease in wages or prices or benefits etc. depending on certain conditions (as a change in the cost of living index) | Synonyms: escalator clause |
| estimator | (noun) an expert at calculation (or at operating calculating machines) | Synonyms: calculator, computer, figurer, reckoner |
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| evaluator | (noun) an authority who is able to estimate worth or quality | Synonyms: judge |
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| excavator | (noun) a machine for excavating | Synonyms: digger, power shovel, shovel |
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| (noun) a workman who excavates for foundations of buildings or for quarrying | - |
| excogitator | (noun) a thinker who considers carefully and thoroughly | - |
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| executor | (noun) a person appointed by a testator to carry out the terms of the will | - |
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| exhibitor | (noun) someone who organizes an exhibit for others to see | Synonyms: exhibitioner, shower |
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| expectorant | (noun) a medicine promoting expectoration | Synonyms: expectorator |
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| expectoration | (noun) the act of spitting (forcefully expelling saliva) | Synonyms: spit, spitting |
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| (noun) the process of coughing up and spitting out | - |
| expectorator | (noun) a medicine promoting expectoration | Synonyms: expectorant |
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| (noun) a person who spits (ejects saliva or phlegm from the mouth) | Synonyms: spitter |
| expositor | (noun) a person who explains | Synonyms: expounder |
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| expurgator | (noun) a person who edits a text by removing obscene or offensive words or passages | Synonyms: bowdleriser, bowdlerizer |
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| exterminator | (noun) someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects) | Synonyms: eradicator, terminator |
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| exteroceptor | (noun) any receptor that responds to stimuli outside the body | - |
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| extirpator | (noun) a farm implement used to remove weeds. | - |
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| extortion | (noun) the felonious act of extorting money (as by threats of violence) | - |
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| (noun) unjust exaction (as by the misuse of authority) | - |
| (noun) an exorbitant charge | - |
| extortioner | (noun) a criminal who extorts money from someone by threatening to expose embarrassing information about them | Synonyms: blackmailer, extortionist |
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| extortionist | (noun) a criminal who extorts money from someone by threatening to expose embarrassing information about them | Synonyms: blackmailer, extortioner |
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| extractor | (noun) an instrument for extracting tight-fitting components | - |
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| (noun) an apparatus that uses centrifugal force to separate particles from a suspension | Synonyms: centrifuge, separator |
| (noun) a mechanism in a firearm that pulls an empty shell case out of the chamber and passes it to the ejector | Synonyms: cartridge extractor, cartridge remover |
| fabricator | (noun) someone who tells lies | Synonyms: fibber, storyteller |
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| facilitator | (noun) someone who makes progress easier | - |
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| 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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| fetor | (noun) a distinctive odor that is offensively unpleasant | Synonyms: foetor, malodor, malodour, mephitis, reek, stench, stink |
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| feudatory | (noun) a person holding a fief; a person who owes allegiance and service to a feudal lord | Synonyms: liege, liege subject, liegeman, vassal |
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| firestorm | (noun) an outburst of controversy | - |
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| (noun) a storm in which violent winds are drawn into the column of hot air rising over a severely bombed area | - |
| flocculator | (noun) An apparatus used in the process of flocculation. | - |
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| foetor | (noun) a distinctive odor that is offensively unpleasant | Synonyms: fetor, malodor, malodour, mephitis, reek, stench, stink |
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| fornicator | (noun) someone who commits adultery or fornication | Synonyms: adulterer |
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| fryolator | (noun) A kitchen appliance for deep frying; its size depends on intended use. | Synonyms: deep fat fryer, deep fryer, frier, fryer |
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| fumigator | (noun) a device that generates a gas for the purpose of disinfecting or eradicating pests | - |
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| (noun) someone whose job is to fumigate | - |
| fumitory | (noun) delicate European herb with greyish leaves and spikes of purplish flowers; formerly used medicinally | Synonyms: Fumaria officinalis, fumeroot, fumewort |
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| gator | (noun) either of two amphibious reptiles related to crocodiles but with shorter broader snouts | Synonyms: alligator |
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| gearmotor | (noun) a motor combined with a set of speed-reducing gears. | - |
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| generator | (noun) engine that converts mechanical energy into electrical energy by electromagnetic induction | - |
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| (noun) an apparatus that produces a vapor or gas | - |
| (noun) an electronic device for producing a signal voltage | - |
| (noun) someone who originates or causes or initiates something | Synonyms: author, source |
| genitor | (noun) a natural father or mother | - |
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| gladiator | (noun) (ancient Rome) a professional combatant or a captive who entertained the public by engaging in mortal combat | - |
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| (noun) a professional boxer | Synonyms: prizefighter |
| grantor | (noun) a person who makes a grant in legal form | - |
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| granulator | (noun) a machine that forms material (such as plastics, bottles, organics, etc.) into granules. | Synonyms: granulator machine |
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| guarantor | (noun) one who provides a warrant or guarantee to another | Synonyms: surety, warranter, warrantor |
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| hailstorm | (noun) a storm during which hail falls | - |
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| haustorium | (noun) a root-like attachment in parasitic plants that penetrates and obtains food from the host | - |
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| heritor | (noun) a person who is entitled by law or by the terms of a will to inherit the estate of another | Synonyms: heir, inheritor |
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| hesitator | (noun) one who hesitates (usually out of fear) | Synonyms: hesitater, vacillator, waverer |
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| historian | (noun) a person who is an authority on history and who studies it and writes about it | Synonyms: historiographer |
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| historicalness | (noun) significance owing to its history | - |
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| (noun) the state of having in fact existed in the past | - |
| historicism | (noun) a theory that social and cultural events are determined by history | - |
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| historiographer | (noun) a person who is an authority on history and who studies it and writes about it | Synonyms: historian |
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| historiography | (noun) the writing of history | - |
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| (noun) a body of historical literature | - |
| history | (noun) the discipline that records and interprets past events involving human beings | - |
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| (noun) all that is remembered of the past as preserved in writing; a body of knowledge | - |
| (noun) a record or narrative description of past events | Synonyms: account, chronicle, story |
| (noun) the aggregate of past events | - |
| (noun) the continuum of events occurring in succession leading from the past to the present and even into the future | - |
| ignitor | (noun) a device for lighting or igniting fuel or charges or fires | Synonyms: igniter, light, lighter |
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| (noun) a substance used to ignite or kindle a fire | Synonyms: igniter, lighter |
| illustrator | (noun) an artist who makes illustrations (for books or magazines or advertisements etc.) | - |
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| imitator | (noun) someone who copies the words or behavior of another | Synonyms: ape, aper, copycat, emulator |
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| (noun) someone who (fraudulently) assumes the appearance of another | Synonyms: impersonator |
| impersonator | (noun) someone who (fraudulently) assumes the appearance of another | Synonyms: imitator |
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| impostor | (noun) a person who makes deceitful pretenses | Synonyms: fake, faker, fraud, imposter, pretender, pseud, pseudo, role player, sham, shammer |
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| incinerator | (noun) a furnace for incinerating (especially to dispose of refuse) | - |
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| incubator | (noun) apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants | Synonyms: brooder |
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| indicator | (noun) a device for showing the operating condition of some system | - |
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| (noun) a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time | Synonyms: index, index number, indicant |
| (noun) a signal for attracting attention | - |
| (noun) (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction | - |
| inductor | (noun) an electrical device (typically a conducting coil) that introduces inductance into a circuit | Synonyms: inductance |
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| infiltrator | (noun) an intruder (as troops) with hostile intent | - |
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| (noun) someone who takes up a position surreptitiously for the purpose of espionage | - |
| inflator | (noun) an air pump operated by hand to inflate something (as a tire) | Synonyms: inflater |
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| inhalator | (noun) a dispenser that produces a chemical vapor to be inhaled in order to relieve nasal congestion | Synonyms: inhaler |
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| (noun) a breathing device for administering long-term artificial respiration | Synonyms: respirator |
| inheritor | (noun) a person who is entitled by law or by the terms of a will to inherit the estate of another | Synonyms: heir, heritor |
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| inhibitor | (noun) a substance that retards or stops an activity | - |
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| initiator | (noun) a person who initiates a course of action | Synonyms: instigator |
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| injector | (noun) a contrivance for injecting (e.g., water into the boiler of a steam engine or particles into an accelerator etc.) | - |
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| (noun) An injector, ejector, steam ejector, steam injector, eductor-jet pump or thermocompressor is a type of pump. | Synonyms: eductor-jet pump, ejector, steam ejector, steam injector, thermocompressor |
| innovator | (noun) someone who helps to open up a new line of research or technology or art | Synonyms: groundbreaker, pioneer, trailblazer |
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| inoculator | (noun) a medical practitioner who inoculates people against diseases | Synonyms: vaccinator |
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| inquisitor | (noun) a questioner who is excessively harsh | Synonyms: interrogator |
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| inspector | (noun) an investigator who observes carefully | Synonyms: examiner |
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| (noun) a high ranking police officer | - |
| inspectorate | (noun) a body of inspectors | - |
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| inspectorship | (noun) the office of inspector | - |
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| instigator | (noun) a person who initiates a course of action | Synonyms: initiator |
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| (noun) someone who deliberately foments trouble | Synonyms: firebrand, inciter, instigant, provoker |
| instillator | (noun) medical apparatus that puts a liquid into a cavity drop by drop | - |
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| instructor | (noun) a person whose occupation is teaching | Synonyms: teacher |
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