commemoration vs commemorative

commemoration and commemorative both are nouns.

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

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

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