commemorative vs commemorate

commemorative is a noun but commemorate is not a noun.

Word	Noun	Adjective	Verb	Adverb
commemorative	Yes	Yes	No	No
commemorate	No	No	Yes	No

commemorative (noun)	commemorate (noun)
an object (such as a coin or postage stamp) made to mark an event or honor a person

commemorative (adjective)	commemorate (adjective)
intended as a commemoration

commemorative (verb)	commemorate (verb)
	call to remembrance; keep alive the memory of someone or something, as in a ceremony
	be or provide a memorial to a person or an event
	celebrate by some ceremony or observation