classification vs classificatory

classification is a noun but classificatory is not a noun.

Word	Noun	Adjective	Verb	Adverb
classification	Yes	No	No	No
classificatory	No	Yes	No	No

classification (noun)	classificatory (noun)
the act of distributing things into classes or categories of the same type
restriction imposed by the government on documents or weapons that are available only to certain authorized people
the basic cognitive process of arranging into classes or categories
a group of people or things arranged by class or category

classification (adjective)	classificatory (adjective)
	relating to or involving classification