secularist vs secularism

secularist and secularism both are nouns.

Word	Noun	Adjective	Verb	Adverb
secularist	Yes	No	No	No
secularism	Yes	No	No	No

secularist (noun)	secularism (noun)
an advocate of secularism; someone who believes that religion should be excluded from government and education	a doctrine that rejects religion and religious considerations