Church of Rome vs Little Office

Church of Rome and Little Office both are nouns.

Word	Noun	Adjective	Verb	Adverb
Church of Rome	Yes	No	No	No
Little Office	Yes	No	No	No

Church of Rome (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