| tobogganist | (noun) someone who rides a toboggan | - |
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| treasonist | (noun) someone who betrays his country by committing treason | Synonyms: traitor |
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| trombonist | (noun) a musician who plays the trombone | Synonyms: trombone player |
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| tympanist | (noun) a person who plays the kettledrums | Synonyms: timpanist |
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| unionist | (noun) a worker who belongs to a trade union | Synonyms: trade unionist, union member |
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| vacationist | (noun) someone on vacation; someone who is devoting time to pleasure or relaxation rather than to work | Synonyms: vacationer |
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| vibraphonist | (noun) a musician who plays the vibraphone | Synonyms: vibist |
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| violinist | (noun) a musician who plays the violin | Synonyms: fiddler |
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| vivisectionist | (noun) a biologist who cuts open live animals for research | - |
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| xylophonist | (noun) someone who plays a xylophone | - |
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