| abiogenist | (noun) a believer in abiogenesis | - |
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| abolitionist | (noun) a reformer who favors abolishing slavery | Synonyms: emancipationist |
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| abortionist | (noun) a person (who should be a doctor) who terminates pregnancies | - |
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| abstractionist | (adjective) not representing or imitating external reality or the objects of nature | Synonyms: abstract, nonfigurative, nonobjective |
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| (noun) a painter of abstract pictures | Synonyms: abstract artist |
| accompanist | (noun) a person who provides musical accompaniment (usually on a piano) | Synonyms: accompanyist |
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| accordionist | (noun) a musician who plays the accordion | - |
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| agonist | (noun) (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction | - |
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| (noun) a muscle that contracts while another relaxes | - |
| (noun) someone involved in a contest or battle (as in an agon) | - |
| (noun) the principal character in a work of fiction | Synonyms: protagonist |
| alienist | (noun) a psychiatrist and specialist in the legal aspects of mental illness | - |
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| alpinist | (noun) a mountain climber who specializes in difficult climbs | - |
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| antagonist | (noun) a drug that neutralizes or counteracts the effects of another drug | - |
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| (noun) a muscle that relaxes while another contracts | - |
| (noun) someone who offers opposition | Synonyms: adversary, opponent, opposer, resister |
| antifeminist | (noun) someone who does not believe in the social or economic or political equality of men and women | - |
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| arianist | (noun) an adherent of Arianism (the belief that Jesus Christ was not truly God) | - |
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| arsonist | (noun) a criminal who illegally sets fire to property | Synonyms: firebug, incendiary |
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| balloonist | (noun) someone who flies a balloon | - |
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| bassoonist | (noun) a musician who plays the bassoon | - |
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| botanist | (noun) a biologist specializing in the study of plants | Synonyms: phytologist, plant scientist |
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| canonist | (adjective) pertaining to or characteristic of a body of rules and principles accepted as axiomatic; e.g. "canonist communism" | - |
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| (noun) a specialist in canon law | - |
| cartoonist | (noun) a person who draws cartoons | - |
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| chauvinist | (noun) an extreme bellicose nationalist | Synonyms: flag-waver, hundred-percenter, jingo, jingoist, patrioteer |
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| (noun) a person with a prejudiced belief in the superiority of his or her own kind | - |
| collaborationist | (noun) someone who collaborates with an enemy occupying force | Synonyms: collaborator, quisling |
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| colonist | (noun) a person who settles in a new colony or moves into new country | Synonyms: settler |
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| columnist | (noun) a journalist who writes editorials | Synonyms: editorialist |
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| communist | (adjective) relating to or marked by communism | Synonyms: communistic |
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| (noun) a socialist who advocates communism | Synonyms: commie |
| concertinist | (noun) a person who plays the concertina | - |
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| conservationist | (noun) someone who works to protect the environment from destruction or pollution | Synonyms: environmentalist |
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| contortionist | (noun) an acrobat able to twist into unusual positions | - |
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| conversationist | (noun) someone skilled at conversation | Synonyms: conversationalist, schmoozer |
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| coreligionist | (noun) someone having the same religion as another person | - |
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| counterrevolutionist | (noun) a revolutionary whose aim is to reverse the changes introduced by an earlier revolution | Synonyms: counter-revolutionist, counterrevolutionary |
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| deconstructionist | (adjective) of or concerned with the philosophical theory of literature known as deconstructionism | - |
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| determinist | (noun) anyone who submits to the belief that they are powerless to change their destiny | Synonyms: fatalist, predestinarian, predestinationist |
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| deviationist | (noun) an ideological defector from the party line (especially from orthodox communism) | - |
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| distortionist | (noun) a painter who introduces distortions | - |
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| diversionist | (noun) someone who commits sabotage or deliberately causes wrecks | Synonyms: saboteur, wrecker |
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| educationist | (noun) a specialist in the theory of education | Synonyms: educationalist |
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| elocutionist | (noun) a public speaker trained in voice production and gesture and delivery | - |
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| emancipationist | (noun) a reformer who favors abolishing slavery | Synonyms: abolitionist |
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| evolutionist | (noun) a person who believes in organic evolution | - |
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| excursionist | (noun) a tourist who is visiting sights of interest | Synonyms: rubberneck, sightseer, tripper |
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| exhibitionist | (noun) someone who deliberately behaves in such a way as to attract attention | Synonyms: show-off |
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| (noun) someone with a compulsive desire to expose the genitals | Synonyms: flasher |
| expansionist | (adjective) of or involving or guided by expansionism | - |
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| expressionist | (adjective) of or relating to expressionism | Synonyms: expressionistic |
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| (noun) an artist who is an adherent of expressionism | - |
| extortionist | (noun) a criminal who extorts money from someone by threatening to expose embarrassing information about them | Synonyms: blackmailer, extortioner |
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| feminist | (adjective) of or relating to or advocating equal rights for women | - |
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| (noun) a supporter of feminism | Synonyms: libber, women's liberationist, women's rightist |
| hedonist | (noun) someone motivated by desires for sensual pleasures | Synonyms: pagan, pleasure seeker |
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| hornist | (noun) a musician who plays a horn (especially a French horn) | - |
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| humanist | (adjective) pertaining to or concerned with the humanities | Synonyms: humane, humanistic |
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| (adjective) of or pertaining to a philosophy asserting human dignity and man's capacity for fulfillment through reason and scientific method and often rejecting religion | Synonyms: humanistic |
| (adjective) of or pertaining to Renaissance humanism | Synonyms: humanistic |
| (adjective) marked by humanistic values and devotion to human welfare | Synonyms: human-centered, human-centred, humanistic, humanitarian |
| (noun) a classical scholar or student of the liberal arts | - |
| (noun) an advocate of the principles of humanism; someone concerned with the interests and welfare of humans | Synonyms: humanitarian |
| hygienist | (noun) a medical specialist in hygiene | - |
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| illusionist | (noun) a person with unusual powers of foresight | Synonyms: seer, visionary |
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| (noun) someone who performs magic tricks to amuse an audience | Synonyms: conjurer, conjuror, magician, prestidigitator |
| impressionist | (adjective) relating to or characteristic of Impressionism | Synonyms: impressionistic |
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| (noun) an artist who follows the theories of Impressionism | - |
| insurrectionist | (noun) a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions) | Synonyms: freedom fighter, insurgent, rebel |
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| internist | (noun) a specialist in internal medicine | - |
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| intuitionist | (adjective) of or relating to intuitionism | - |
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| ironist | (noun) a humorist who uses ridicule and irony and sarcasm | Synonyms: ridiculer, satirist |
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| irreligionist | (noun) someone who is indifferent or hostile to religion | - |
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| isolationist | (adjective) of or relating to isolationism | Synonyms: isolationistic |
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| (noun) an advocate of isolationism in international affairs | - |
| larcenist | (noun) a person who commits larceny | Synonyms: larcener |
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| lutanist | (noun) a musician who plays the lute | Synonyms: lutenist, lutist |
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| lutenist | (noun) a musician who plays the lute | Synonyms: lutanist, lutist |
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| machinist | (noun) a craftsman skilled in operating machine tools | Synonyms: mechanic, shop mechanic |
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| mechanist | (noun) a philosopher who subscribes to the doctrine of mechanism | - |
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| misogynist | (noun) a misanthrope who dislikes women in particular | Synonyms: woman hater |
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| mnemonist | (noun) an expert in the use of mnemonics; someone able to perform unusual feats of memory | - |
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| moderationist | (noun) a person who takes a position in the political center | Synonyms: centrist, middle of the roader, moderate |
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| (noun) a moderate drinker (as opposed to a total abstainer) | - |
| modernist | (noun) an artist who makes a deliberate break with previous styles | - |
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| monogynist | (noun) someone who practices monogamy (one spouse at a time) | Synonyms: monogamist |
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| nutritionist | (noun) a specialist in the study of nutrition | - |
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| obstructionist | (noun) someone who systematically obstructs some action that others want to take | Synonyms: obstructer, obstructor, resister, thwarter |
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| onanist | (noun) a person who practices masturbation | Synonyms: masturbator |
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| opportunist | (adjective) taking immediate advantage, often unethically, of any circumstance of possible benefit | Synonyms: opportunistic, timeserving |
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| (noun) a person who places expediency above principle | Synonyms: self-seeker |
| organist | (noun) a person who plays an organ | - |
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| partitionist | (noun) an advocate of partitioning a country | - |
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| percussionist | (noun) a musician who plays percussion instruments | - |
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| perfectionist | (noun) a person who is displeased by anything that does not meet very high standards | - |
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| philhellenist | (noun) an admirer of Greece and everything Greek | Synonyms: Graecophile, philhellene |
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| pianist | (noun) a person who plays the piano | Synonyms: piano player |
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| polygynist | (noun) a man with two or more wives | - |
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| postmodernist | (adjective) of or relating to postmodernism | Synonyms: postmodern |
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| predestinationist | (noun) anyone who submits to the belief that they are powerless to change their destiny | Synonyms: determinist, fatalist, predestinarian |
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| preservationist | (noun) someone who advocates the preservation of historical sites or endangered species or natural areas | - |
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| prohibitionist | (noun) a reformer who opposes the use of intoxicating beverages | Synonyms: dry |
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| projectionist | (noun) the person who operates the projector in a movie house | - |
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| protagonist | (noun) a person who backs a politician or a team etc. | Synonyms: admirer, booster, champion, friend, supporter |
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| (noun) the principal character in a work of fiction | Synonyms: agonist |
| protectionist | (noun) an advocate of protectionism | - |
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| reactionist | (adjective) opposed to political or social liberalism or reform | Synonyms: far-right, reactionary |
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| receptionist | (noun) a secretary whose main duty is to answer the telephone and receive visitors | - |
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| reductionist | (adjective) of or relating to the theory of reductionism | - |
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| religionist | (noun) a person addicted to religion or a religious zealot | - |
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| reversionist | (noun) someone who lapses into previous undesirable patterns of behavior | Synonyms: backslider, recidivist |
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| revisionist | (noun) a Communist who tries to rewrite Marxism to justify a retreat from the revolutionary position | - |
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| revolutionist | (noun) a radical supporter of political or social revolution | Synonyms: revolutionary, subversive, subverter |
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| saxophonist | (noun) a musician who plays the saxophone | Synonyms: saxist |
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| secessionist | (noun) an advocate of secessionism | - |
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| segregationist | (noun) someone who believes the racial groups should be kept apart | Synonyms: segregator |
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| separationist | (noun) an advocate of secession or separation from a larger group (such as an established church or a national union) | Synonyms: separatist |
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| shamanist | (adjective) of or relating to shamanism | Synonyms: shamanistic |
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| symphonist | (noun) a composer of symphonies | - |
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| telephonist | (noun) someone who helps callers get the person they are calling | Synonyms: switchboard operator, telephone operator |
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| timpanist | (noun) a person who plays the kettledrums | Synonyms: tympanist |
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| tobacconist | (noun) a shop that sells pipes and pipe tobacco and cigars and cigarettes | Synonyms: tobacco shop, tobacconist shop |
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| (noun) a retail dealer in tobacco and tobacco-related articles | - |