separatist vs separatism

separatist and separatism both are nouns.

Word	Noun	Adjective	Verb	Adverb
separatist	Yes	Yes	No	No
separatism	Yes	No	No	No

separatist (noun)	separatism (noun)
an advocate of secession or separation from a larger group (such as an established church or a national union)	advocacy of a policy of strict separation of church and state
	a disposition toward schism and secession from a larger group; the principles and practices of separatists
	a social system that provides separate facilities for minority groups

separatist (adjective)	separatism (adjective)
having separated or advocating separation from another entity or policy or attitude