WordNet (r) 3.0 (2006):

show business
    n 1: those involved in providing entertainment: radio and
         television and films and theater [syn: entertainment
         industry, show business, show biz]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "show business":
   amusement park, ballroom, cabaret, cafe chantant, cafe dansant,
   casino, dance floor, dance hall, dancing pavilion,
   entertainment industry, fun-fair, juke joint, night spot,
   nightclub, nitery, resort, roadhouse, show biz, tavern, theater