commemorative vs commemoration

commemorative and commemoration both are nouns.

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

commemorative (noun)	commemoration (noun)
an object (such as a coin or postage stamp) made to mark an event or honor a person	a recognition of meritorious service
	a ceremony to honor the memory of someone or something

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