Little Office vs Roman Church

Little Office and Roman Church both are nouns.

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

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