11 letters · 19 points in Scrabble
verb mark by some ceremony or observation
verb call to remembrance; keep alive the memory of someone or something, as in a ceremony
verb be or provide a memorial to a person or an event
originFirst attested in 1599; borrowed from Latin commemorātus, perfect passive participle of commemorō, see -ate (verb-forming suffix) and -ate (adjective-forming suffix). Sporadic usage of the adjective up until Early Modern English.
Etymology from Wiktionary, CC BY-SA 3.0