Office of the Dead vs Roman Catholic Church

Office of the Dead and Roman Catholic Church both are nouns.

Word	Noun	Adjective	Verb	Adverb
Office of the Dead	Yes	No	No	No
Roman Catholic Church	Yes	No	No	No

Office of the Dead (noun)	Roman Catholic Church (noun)
an office read or sung before a burial mass in the Roman Catholic Church	the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy