WordNet (r) 3.0 (2006):

chorus girl
    n 1: a woman who dances in a chorus line [syn: chorus girl,
         showgirl, chorine]

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "chorus girl":
   artist, artiste, ballerina, ballet dancer, ballet girl,
   ballroom dancer, belly dancer, burlesque queen, choir member,
   choirboy, choirman, choral dancer, choral singer, choralist,
   chorine, chorister, chorus boy, chorus singer, clog dancer,
   conjurer, coryphee, dancer, dancing girl, danseur noble, danseuse,
   ecdysiast, entertainer, exotic dancer, female impersonator,
   figurant, figurante, geisha, geisha girl, guisard, guiser,
   heel-and-toe dancer, hoofer, hula girl, impersonator, magician,
   mountebank, mummer, musician, nautch girl, peeler, performer,
   prestidigitator, public entertainer, show girl, singer,
   square-dancer, stripper, stripteaser, stripteuse, terpsichorean,
   vaudevillian, vaudevillist