Russian Orthodox vs faith

Russian Orthodox is not a noun while faith is a noun.

Word	Noun	Adjective	Verb	Adverb
Russian Orthodox	No	Yes	No	No
faith	Yes	No	No	No

Russian Orthodox (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

Russian Orthodox (adjective)	faith (adjective)
of or relating to or characteristic of the Eastern Orthodox Church