immaterial vs spiritual

immaterial is not a noun while spiritual is a noun.

Word	Noun	Adjective	Verb	Adverb
immaterial	No	Yes	No	No
spiritual	Yes	Yes	No	No

immaterial (noun)	spiritual (noun)
	a kind of religious song originated by Blacks in the southern United States

immaterial (adjective)	spiritual (adjective)
not consisting of matter	lacking material body or form or substance
of no importance or relevance especially to a law case	concerned with sacred matters or religion or the church
without material form or substance	resembling or characteristic of a phantom
not pertinent to the matter under consideration	concerned with or affecting the spirit or soul
(often followed by `to') lacking importance; not mattering one way or the other