Sister vs Roman Catholic

Sister and Roman Catholic both are nouns.

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

Sister (noun)	Roman Catholic (noun)
(Roman Catholic Church) a title given to a nun (and used as a 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

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