spiritualist vs spiritualistic

spiritualist is a noun but spiritualistic is not a noun.

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

As adjectives, spiritualist and spiritualistic are synonyms defined as:

spiritualist and spiritualistic: of or relating to or connected with spiritualism

spiritualist (noun)	spiritualistic (noun)
someone who serves as an intermediary between the living and the dead

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