spiritualism vs spiritism

spiritualism and spiritism both are nouns.

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

As nouns, spiritualism and spiritism are synonyms defined as:

Other synonyms of spiritualism include otherworldliness, spirituality.

spiritualism (noun)	spiritism (noun)
concern with things of the spirit	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