sacred vs spiritual

sacred is not a noun while spiritual is a noun.

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

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

sacred (adjective)	spiritual (adjective)
concerned with religion or religious purposes	lacking material body or form or substance
(often followed by `to') devoted exclusively to a single use or purpose or person	concerned with sacred matters or religion or the church
made or declared or believed to be holy; devoted to a deity or some religious ceremony or use	resembling or characteristic of a phantom
worthy of respect or dedication	concerned with or affecting the spirit or soul
worthy of religious veneration