11 letters · 20 points in Scrabble
originEtymology tree English caffeine Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-tós Proto-Indo-European *-eh₂tos Proto-Italic *-ātos Latin -ātuslbor. English -ate English caffeinate English -ed English caffeinated From caffeinate + -ed.
Etymology from Wiktionary, CC BY-SA 3.0