THESAURUS
adherent, applauder, appreciator, attender, audience, booster, buff, commender, deadhead, encomiast, eulogist, eulogizer, extoller, fan, groundling, hired applauder, lauder, moviegoer, panegyrist, pass holder, playgoer, plugger, praiser, promoter, puffer, rooter, spectator, standee, theatergoer, tout, touter
ROGET THESAURUS
Flatterer
N
flatterer, adulator, eulogist, euphemist, optimist, encomiast, laudator, whitewasher, toady, toadeater, sycophant, courtier, Sir Pertinax MacSycophant, flaneur, proneur, puffer, touter,
claqueur, clawback, earwig, doer of dirty work, parasite, hanger-on, yes-man, suckup, ass-kisser, brown-noser, teacher's pet, pessimum genus inimicorum laudantes.