spiritualism vs belief

spiritualism and belief both are nouns.

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

As nouns, belief is a hypernym of spiritualism; that is, belief is a word with a broader meaning than spiritualism:

spiritualism: the belief that the spirits of dead people can communicate with people who are still alive (especially via a medium)
belief: any cognitive content held as true

spiritualism (noun)	belief (noun)
concern with things of the spirit	any cognitive content held as true
the belief that the spirits of dead people can communicate with people who are still alive (especially via a medium)	a vague idea in which some confidence is placed
(theology) any doctrine that asserts the separate existence of God