Roman Catholic Church vs Saint Ambrose

Roman Catholic Church and Saint Ambrose both are nouns.

Word	Noun	Adjective	Verb	Adverb
Roman Catholic Church	Yes	No	No	No
Saint Ambrose	Yes	No	No	No

Roman Catholic Church (noun)	Saint Ambrose (noun)
the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy	(Roman Catholic Church) Roman priest who became bishop of Milan; the first Church Father born and raised in the Christian faith; composer of hymns; imposed orthodoxy on the early Christian church and built up its secular power; a saint and Doctor of the Church (340?-397)