The Collaborative International Dictionary of English v.0.48:

Reveler \Rev"el*er\, n. [Written also reveller.]
   One who revels. "Moonshine revelers." --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

reveler
    n 1: a celebrant who shares in a noisy party; "the clubs attract
         revelers as young as thirteen" [syn: reveler, reveller,
         merrymaker]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "reveler":
   alcoholic, alcoholic addict, bacchanal, bacchanalian, bibber,
   big drunk, boozer, carouser, chronic alcoholic, chronic drunk,
   contestant, cutup, devotee of Bacchus, dipsomaniac, drinker, drunk,
   drunkard, frisker, frolicker, funmaker, gamboler, guzzler,
   hard drinker, heavy drinker, imbiber, inebriate, lovepot,
   merrymaker, oenophilist, pathological drinker, playboy, player,
   pleasure-seeker, pleasurer, pleasurist, pot companion,
   problem drinker, rollicker, serious drinker, shikker, skylarker,
   soaker, social drinker, sot, swigger, swiller, thirsty soul,
   tippler, toper, tosspot, wassailer, winebibber