impure vs faith

impure is not a noun while faith is a noun.

Word	Noun	Adjective	Verb	Adverb
impure	No	Yes	No	No
faith	Yes	No	No	No

impure (noun)	faith (noun)
	loyalty or allegiance to a cause or a person
	a strong belief in a supernatural power or powers that control human destiny
	complete confidence in a person or plan etc
	an institution to express belief in a divine power

impure (adjective)	faith (adjective)
(used of persons or behaviors) immoral or obscene
combined with extraneous elements
having a physical or moral blemish so as to make impure according to dietary or ceremonial laws