separatism vs separationism

separatism and separationism both are nouns.

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

As nouns, separatism and separationism are synonyms defined as:

separatism and separationism: advocacy of a policy of strict separation of church and state

separatism (noun)	separationism (noun)
advocacy of a policy of strict separation of church and state	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