Roman Church vs Little Office

Roman Church and Little Office both are nouns.

Word	Noun	Adjective	Verb	Adverb
Roman Church	Yes	No	No	No
Little Office	Yes	No	No	No

Roman Church (noun)	Little Office (noun)
the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy	a Roman Catholic office honoring the Virgin Mary; similar to but shorter than the Divine Office