The Collaborative International Dictionary of English v.0.48:

Troupe \Troupe\, n. [F., troop. See Troop.]
   A company or troop, especially the company pf performers in a
   play or an opera.
   [1913 Webster]

WordNet (r) 3.0 (2006):

troupe
    n 1: organization of performers and associated personnel
         (especially theatrical); "the traveling company all stayed
         at the same hotel" [syn: company, troupe]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "troupe":
   act, act as foil, acting company, age group, appear, band,
   barnstorm, battalion, bevy, body, brigade, bunch, cabal, cast,
   cast of characters, characters, chorus, circus troupe, clique,
   cohort, come out, company, complement, contingent, corps,
   corps de ballet, coterie, covey, crew, crowd, detachment, detail,
   division, dramatis personae, emote, emotionalize, ensemble,
   faction, fleet, gang, get top billing, group, grouping, groupment,
   in-group, junta, mime, mob, movement, out-group, outfit, pack,
   pantomime, party, patter, peer group, perform, phalanx, platoon,
   play, play the lead, playact, posse, regiment, register,
   repertory company, salon, set, sketch, squad, stable, star,
   steal the show, stock company, stooge, string, supporting cast,
   team, tread the boards, tribe, troop, upstage, wing