The Collaborative International Dictionary of English v.0.48:

Carousal \Ca*rous"al\, n. [See Carouse, but also cf. F.
   carrousel tilt.]
   A jovial feast or festival; a drunken revel; a carouse.
   [1913 Webster]

         The swains were preparing for a carousal. --Sterne.

   Syn: Banquet; revel; orgie; carouse. See Feast.
        [1913 Webster]

WordNet (r) 3.0 (2006):

carousal
    n 1: revelry in drinking; a merry drinking party [syn:
         carouse, carousal, bender, toot, booze-up]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "carousal":
   bacchanal, bacchanalia, bacchanalian, bat, bender, binge, booze,
   bout, brannigan, bust, carouse, celebration, compotation, debauch,
   debauchery, debauchment, dissipation, drinking bout, drunk,
   drunken carousal, escapade, fling, free living, guzzle,
   high living, jag, killing pace, lark, licentiousness, orgy, ploy,
   potation, pub-crawl, randan, randy, revel, riotous living,
   saturnalia, spree, symposium, tear, toot, wassail, wingding