13 letters · 24 points in Scrabble
noun an object (such as a coin or postage stamp) made to mark an event or honor a person
adjective intended as a commemoration
originFirst attested in 1612; borrowed from New Latin commemorātīvus, from commemorō. By surface analysis, commemorate + -ive, cognate with French commémoratif.
Etymology from Wiktionary, CC BY-SA 3.0