14 letters · 22 points in Scrabble
noun a constantly changing medley of real or imagined images (as in a dream)
originBorrowed from French phantasmagorie, from Ancient Greek φάντασμα (phántasma, “ghost”) + possibly either ἀγορά (agorá, “assembly, gathering”) + the suffix -ia or ἀγορεύω (agoreúō, “to speak publicly”).
Etymology from Wiktionary, CC BY-SA 3.0