WordNet (r) 3.0 (2006):

jazz band
    n 1: a small band of jazz musicians [syn: jazz band, jazz
         group, combo]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "jazz band":
   German band, Philharmonic, band, big band, brass, brass band,
   brass choir, brass quintet, brass section, brasses,
   callithumpian band, chamber orchestra, combo, concert band, desks,
   dixieland band, ensemble, gamelan orchestra, group, jug band,
   military band, orchestra, quartet, quintet, ragtime band,
   rock-and-roll group, sextet, skiffle band, steel band, street band,
   string band, string choir, string orchestra, string quartet,
   strings, swing band, symphony, symphony orchestra, trio, waits,
   woodwind, woodwind choir, woodwind quartet, woodwinds