Synonyms for Bacchanalia (same or very similar meaning)
WordNet sense 1 (an orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus)):
Dionysia
WordNet sense 2 (a wild gathering involving excessive drinking and promiscuity):
bacchanal, debauch, debauchery, orgy, riot, saturnalia, drunken revelry
From the ODE community, based on WordNet
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