religious belief vs unclean

religious belief is a noun but unclean is not a noun.

Word	Noun	Adjective	Verb	Adverb
religious belief	Yes	No	No	No
unclean	No	Yes	No	No

religious belief (noun)	unclean (noun)
a strong belief in a supernatural power or powers that control human destiny

religious belief (adjective)	unclean (adjective)
	having a physical or moral blemish so as to make impure according to dietary or ceremonial laws
	soiled or likely to soil with dirt or grime