Brother vs Roman Catholic

Brother and Roman Catholic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brother	Yes	No	No	No
Roman Catholic	Yes	Yes	No	No

Brother (noun)	Roman Catholic (noun)
(Roman Catholic Church) a title given to a monk and used as form of address	the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy
	a member of the Roman Catholic Church

Brother (adjective)	Roman Catholic (adjective)
	of or relating to or supporting Romanism