THESAURUS
accepter, acquirer, addressee, aficionado, attender, attestant, attestator, attester, audience, auditor, auditory, beholder, buff, bystander, claqueur, cojuror, compurgator, congregation, consignee, deadhead, deponent, earwitness, eyewitness, fan, frequenter, gallery, gazer, getter, groundling, habitue, haunter, hearer, hired applauder, holder, house, informant, informer, listener, looker, looker-on, moviegoer, newer, observer, obtainer, onlooker, orchestra, pass holder, passerby, patron, payee, perceiver, pit, playgoer, procurer, receiver, recipient, seer, standee, swearer, taker, testifier, theater, theatergoer, trustee, viewer, visitor, voucher, watcher, witness
ROGET THESAURUS
Spectator
N
spectator, beholder, observer, looker-on, onlooker, witness, eyewitness, bystander, passer by, sightseer, rubberneck, rubbernecker, spy, sentinel.