spiritual vs immaterial

spiritual is a noun but immaterial is not a noun.

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

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

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