separatism vs separation

separatism and separation both are nouns.

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

As nouns, separation is a hypernym of separatism; that is, separation is a word with a broader meaning than separatism:

separatism (noun)	separation (noun)
advocacy of a policy of strict separation of church and state	the social act of separating or parting company
a disposition toward schism and secession from a larger group; the principles and practices of separatists	the act of dividing or disconnecting
a social system that provides separate facilities for minority groups	(law) the cessation of cohabitation of man and wife (either by mutual agreement or under a court order)
	sorting one thing from others
	the distance between things
	coming apart
	the termination of employment (by resignation or dismissal)
	the space where a division or parting occurs
	the state of lacking unity