11 letters · 20 points in Scrabble
noun an orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus)
noun a wild gathering involving excessive drinking and promiscuity
originFrom Latin Bacchānālia (“feast of Bacchus”), plural of Bacchānal (“a place devoted to Bacchus”), from Bacchus (“the god of wine”), from Ancient Greek Βάκχος (Bákkhos).
Etymology from Wiktionary, CC BY-SA 3.0