| abator | (noun) a person who abates a nuisance | - |
|---|
| abbreviator | (noun) one who shortens or abridges or condenses a written work | Synonyms: abridger |
|---|
| abdicator | (noun) one who formally relinquishes an office or responsibility | - |
|---|
| abnegator | (noun) one who gives up or relinquishes or renounces something | - |
|---|
| abominator | (noun) one who hates or loathes | Synonyms: loather |
|---|
| abrogator | (noun) an authority or official empowered to abolish or annul or repeal | - |
|---|
| accelerator | (noun) a valve that regulates the supply of fuel to the engine | Synonyms: throttle, throttle valve |
|---|
| (noun) a scientific instrument that increases the kinetic energy of charged particles | Synonyms: atom smasher, particle accelerator |
| (noun) a pedal that controls the throttle valve | Synonyms: accelerator pedal, gas, gas pedal, gun, throttle |
| (noun) (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected | Synonyms: catalyst |
| accommodator | (noun) someone who performs a service or does a favor | Synonyms: obliger |
|---|
| accumulator | (noun) a voltaic battery that stores electric charge | Synonyms: storage battery |
|---|
| (noun) (computer science) a register that has a built-in adder that adds an input number to the contents of the register | Synonyms: accumulator register |
| (noun) a person who is employed to collect payments (as for rent or taxes) | Synonyms: collector, gatherer |
| activator | (noun) (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription | - |
|---|
| actuator | (noun) a mechanism that puts something into automatic action | - |
|---|
| adjudicator | (noun) a person who studies and settles conflicts and disputes | - |
|---|
| administrator | (noun) someone who administers a business | Synonyms: decision maker |
|---|
| (noun) the party appointed by a probate court to distribute the estate of someone who dies without a will or without naming an executor | - |
| (noun) someone who manages a government agency or department | Synonyms: executive |
| adulator | (noun) a person who uses flattery | Synonyms: flatterer |
|---|
| adulterator | (noun) a changer who lessens the purity or effectiveness of a substance | - |
|---|
| (noun) any substance that lessens the purity or effectiveness of a substance | Synonyms: adulterant |
| advocator | (noun) a person who pleads for a cause or propounds an idea | Synonyms: advocate, exponent, proponent |
|---|
| aerator | (noun) an apparatus for exposing something to the air (as sewage) | - |
|---|
| aerogenerator | (noun) generator that extracts usable energy from winds | Synonyms: wind generator, windmill |
|---|
| agglomerator | (noun) a device that causes material to gather into rounded balls | - |
|---|
| aggravator | (noun) an unpleasant person who is annoying or exasperating | Synonyms: annoyance |
|---|
| aggregator | (noun) a person who collects things | Synonyms: collector |
|---|
| agitator | (noun) one who agitates; a political troublemaker | Synonyms: fomenter |
|---|
| alienator | (noun) an unpleasant person who causes friendly people to become indifferent or unfriendly or hostile | - |
|---|
| alleviator | (noun) remedy that alleviates pain without curing | Synonyms: alleviant, palliative |
|---|
| (noun) a therapist who makes suffering more endurable | - |
| alligator | (noun) either of two amphibious reptiles related to crocodiles but with shorter broader snouts | Synonyms: gator |
|---|
| (noun) leather made from alligator's hide | - |
| (verb) crack and acquire the appearance of alligator hide, as from weathering or improper application; of paint and varnishes | - |
| alliterator | (noun) a speaker or writer who makes use of alliteration | - |
|---|
| allocator | (noun) a person with authority to allot or deal out or apportion | Synonyms: distributor |
|---|
| alternator | (noun) an old term for an electric generator that produces alternating current (especially in automobiles) | - |
|---|
| amalgamator | (noun) a businessman who arranges an amalgamation of two or more commercial companies | - |
|---|
| amputator | (noun) a surgeon who removes part or all of a limb | - |
|---|
| animator | (noun) the technician who produces animated cartoons | - |
|---|
| (noun) someone who imparts energy and vitality and spirit to other people | Synonyms: energiser, energizer, vitaliser, vitalizer |
| annihilator | (noun) a total destroyer | - |
|---|
| annotator | (noun) a commentator who writes notes to a text | - |
|---|
| annunciator | (noun) an indicator that announces which electrical circuit has been active (as on a telephone switchboard) | - |
|---|
| anticipator | (noun) one who anticipates | Synonyms: anticipant |
|---|
| applicator | (noun) a device for applying a substance | Synonyms: applier |
|---|
| appreciator | (noun) a person who is fully aware of something and understands it | - |
|---|
| appropriator | (noun) someone who takes for his or her own use (especially without permission) | - |
|---|
| arbitrator | (noun) someone chosen to judge and decide a disputed issue | Synonyms: arbiter, umpire |
|---|
| arrogator | (noun) a person who through conceit makes pretentious claims to rights or advantages that he or she is not entitled to or to qualities that he or she does not possess | - |
|---|
| articulator | (noun) a movable speech organ | - |
|---|
| (noun) someone who pronounces words | - |
| asphyxiator | (noun) a manually operated device for extinguishing small fires | Synonyms: extinguisher, fire extinguisher |
|---|
| aspirator | (noun) a pump that draws air or another gas through a liquid | - |
|---|
| assassinator | (noun) a murderer (especially one who kills a prominent political figure) who kills by a surprise attack and often is hired to do the deed | Synonyms: assassin, bravo |
|---|
| asseverator | (noun) someone who claims to speak the truth | Synonyms: affirmer, asserter, avower, declarer |
|---|
| assimilator | (noun) someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs | Synonyms: learner, scholar, student |
|---|
| astrogator | (noun) the navigator of a spacecraft | - |
|---|
| attenuator | (noun) an electrical device for attenuating the strength of an electrical signal | - |
|---|
| attestator | (noun) (law) a person who attests to the genuineness of a document or signature by adding their own signature | Synonyms: attestant, attestor, witness |
|---|
| authenticator | (noun) one who determines authenticity (as of works of art) or who guarantees validity | Synonyms: appraiser |
|---|
| aviator | (noun) someone who operates an aircraft | Synonyms: aeronaut, flier, flyer |
|---|
| barrator | (noun) someone guilty of barratry | Synonyms: barrater |
|---|
| bronchodilator | (noun) a drug that relaxes and dilates the bronchial passageways and improves the passages of air into the lungs | - |
|---|
| calculator | (noun) a small machine that is used for mathematical calculations; can be mechanical or electronic | Synonyms: calculating machine |
|---|
| (noun) an expert at calculation (or at operating calculating machines) | Synonyms: computer, estimator, figurer, reckoner |
| calorisator | (noun) an apparatus used in beet-sugar factories to heat the juice in order to aid the diffusion. | Synonyms: calorizator |
|---|
| calorizator | (noun) an apparatus used in beet-sugar factories to heat the juice in order to aid the diffusion. | Synonyms: calorisator |
|---|
| carbonator | (noun) a device that carries out carbonation. | Synonyms: soda carbonator, soda maker |
|---|
| celebrator | (noun) a person who is celebrating | Synonyms: celebrant, celebrater |
|---|
| coagulator | (noun) an agent that produces coagulation | Synonyms: coagulant |
|---|
| coconspirator | (noun) a member of a conspiracy | Synonyms: conspirator, machinator, plotter |
|---|
| collaborator | (noun) an associate in an activity or endeavor or sphere of common interest | Synonyms: cooperator, pardner, partner |
|---|
| (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 |
| collator | (noun) a machine that selects, merges and matches decks of punch cards. | - |
|---|
| collimator | (noun) optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam | - |
|---|
| (noun) a small telescope attached to a large telescope to use in setting the line of the larger one | - |
| commentator | (noun) a writer who reports and analyzes events of the day | Synonyms: reviewer |
|---|
| (noun) an expert who observes and comments on something | Synonyms: observer |
| communicator | (noun) a person who communicates with others | - |
|---|
| commutator | (noun) switch for reversing the direction of an electric current | - |
|---|
| conciliator | (noun) someone who tries to bring peace | Synonyms: make-peace, pacifier, peacemaker, reconciler |
|---|
| congenator | (noun) an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus) | Synonyms: congener, congeneric, relative |
|---|
| conservator | (noun) the custodian of a collection (as a museum or library) | Synonyms: curator |
|---|
| (noun) someone appointed by a court to assume responsibility for the interests of a minor or incompetent person | - |
| conspirator | (noun) a member of a conspiracy | Synonyms: coconspirator, machinator, plotter |
|---|
| cooperator | (noun) an associate in an activity or endeavor or sphere of common interest | Synonyms: collaborator, pardner, partner |
|---|
| coordinator | (noun) someone whose task is to see that work goes harmoniously | Synonyms: co-ordinator |
|---|
| counterdemonstrator | (noun) someone who demonstrates in opposition to another demonstration | - |
|---|
| creator | (noun) a person who grows or makes or invents things | - |
|---|
| cultivator | (noun) a farm implement used to break up the surface of the soil (for aeration and weed control and conservation of moisture) | Synonyms: tiller |
|---|
| (noun) someone concerned with the science or art or business of cultivating the soil | Synonyms: agriculturalist, agriculturist, grower, raiser |
| cunctator | (noun) someone who postpones work (especially out of laziness or habitual carelessness) | Synonyms: postponer, procrastinator |
|---|
| curator | (noun) the custodian of a collection (as a museum or library) | Synonyms: conservator |
|---|
| decorator | (noun) someone who decorates | Synonyms: ornamentalist |
|---|
| (noun) a person who specializes in interior decoration | Synonyms: house decorator, interior decorator, room decorator |
| defalcator | (noun) someone who violates a trust by taking (money) for his own use | Synonyms: embezzler, peculator |
|---|
| defecator | (noun) (obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups. | - |
|---|
| (noun) a person who defecates | Synonyms: shitter, voider |
| defibrillator | (noun) an electronic device that administers an electric shock of preset voltage to the heart through the chest wall in an attempt to restore the normal rhythm of the heart during ventricular fibrillation | - |
|---|
| deflator | (noun) a statistical factor designed to remove the effect of inflation; inflation adjusted variables are in constant dollars | - |
|---|
| defoliator | (noun) an insect that strips the leaves from plants | - |
|---|
| demodulator | (noun) rectifier that extracts modulation from a radio carrier wave | Synonyms: detector |
|---|
| demonstrator | (noun) someone who participates in a public display of group feeling | Synonyms: protester |
|---|
| (noun) someone who demonstrates an article to a prospective buyer | Synonyms: sales demonstrator |
| (noun) a teacher or teacher's assistant who demonstrates the principles that are being taught | - |
| denitrator | (noun) Any device used to remove nitrates or other nitrogen compounds, especially from water. | - |
|---|
| denominator | (noun) the divisor of a fraction | - |
|---|
| depilator | (noun) a cosmetic for temporary removal of undesired hair | Synonyms: depilatory, epilator |
|---|
| depreciator | (noun) one who disparages or belittles the worth of something | Synonyms: detractor, disparager, knocker |
|---|
| detonator | (noun) a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive | Synonyms: cap, detonating device |
|---|
| dictator | (noun) a ruler who is unconstrained by law | Synonyms: potentate |
|---|
| (noun) a person who behaves in a tyrannical manner | Synonyms: authoritarian |
| (noun) a speaker who dictates to a secretary or a recording machine | - |
| differentiator | (noun) a person who (or that which) differentiates | Synonyms: discriminator |
|---|
| dilator | (noun) a surgical instrument that is used to dilate or distend an opening or an organ | Synonyms: dilater |
|---|
| (noun) a drug that causes dilation | - |
| (noun) a muscle or nerve that dilates or widens a body part | - |
| disambiguator | (noun) (computer science) a natural language processing application that tries to determine the intended meaning of a word or phrase by examining the linguistic context in which it is used | - |
|---|
| discriminator | (noun) a person who (or that which) differentiates | Synonyms: differentiator |
|---|
| disseminator | (noun) someone who spreads the news | Synonyms: propagator |
|---|
| dissimulator | (noun) a person who professes beliefs and opinions that he or she does not hold in order to conceal his or her real feelings or motives | Synonyms: dissembler, hypocrite, phoney, phony, pretender |
|---|
| duplicator | (noun) apparatus that makes copies of typed, written or drawn material | Synonyms: copier |
|---|
| educator | (noun) someone who educates young people | Synonyms: pedagog, pedagogue |
|---|
| ejaculator | (noun) a speaker who utters a sudden exclamation | - |
|---|
| (noun) a man who ejaculates semen | - |