spiritualist vs spiritualism

spiritualist and spiritualism both are nouns.

Word	Noun	Adjective	Verb	Adverb
spiritualist	Yes	Yes	No	No
spiritualism	Yes	No	No	No

spiritualist (noun)	spiritualism (noun)
someone who serves as an intermediary between the living and the dead	concern with things of the spirit
	the belief that the spirits of dead people can communicate with people who are still alive (especially via a medium)
	(theology) any doctrine that asserts the separate existence of God

spiritualist (adjective)	spiritualism (adjective)
of or relating to or connected with spiritualism