13 letters · 21 points in Scrabble
noun a ceremony to honor the memory of someone or something
noun a recognition of meritorious service
originFirst attested in 1384, in Middle English; inherited from Middle English commemoracioun, from Old French commemoration (French commémoration), from Latin commemorātiō. By surface analysis, commemorate + -ion
Etymology from Wiktionary, CC BY-SA 3.0