WordNet (r) 3.0 (2006):

trouper
    n 1: a person who is reliable and uncomplaining and hard working
    2: an actor who travels around the country presenting plays
       [syn: barnstormer, playactor, play-actor, trouper]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "trouper":
   Roscius, actor, actress, antagonist, artiste, bad guy, barnstormer,
   character, character actor, character man, character woman,
   child actor, diseur, diseuse, dramatizer, entertainer, feeder,
   foil, heavy, histrio, histrion, impersonator, ingenue, juvenile,
   matinee idol, mime, mimer, mimic, monologist, mummer, pantomime,
   pantomimist, performer, playactor, player, protean actor, reciter,
   soubrette, stage performer, stage player, stooge, straight man,
   stroller, strolling player, theatrical, thespian, utility man,
   villain