WordNet (r) 3.0 (2006):

shindig
    n 1: a large and noisy party of people [syn: shindig,
         shindy]

Moby Thesaurus II by Grady Ward, 1.0:

99 Moby Thesaurus words for "shindig":
   Kaffeeklatsch, affair, assemblee, assembly, assignation, at home,
   bal, bal costume, bal masque, ball, barn dance, bash, blowout,
   brawl, caucus, cocktail party, coffee klatch, coil, colloquium,
   commission, committee, conclave, concourse, congregation, congress,
   conventicle, convention, convocation, costume party, council,
   country dance, dance, date, diet, dinner, dinner party,
   donation party, eisteddfod, entertainment, fancy-dress ball,
   festivity, fete, foofaraw, forgathering, forum, furore, gala,
   garden party, gathering, get-together, hen party, hop, house party,
   house-raising, housewarming, lawn party, levee, mask, masked ball,
   masque, masquerade, masquerade ball, masquerade party, meet,
   meeting, mixer, panel, party, plenum, prom, promenade, quorum,
   rally, reception, record hop, rendezvous, ruckus, rumpus, seance,
   session, shebang, shindy, shower, sit-in, sitting, smoker, soiree,
   square dance, stag, stag dance, stag party, surprise party,
   symposium, synod, tea dance, the dansant, to-do, turnout, uproar