Church of Rome vs St. John Chrysostom

Church of Rome and St. John Chrysostom both are nouns.

Word	Noun	Adjective	Verb	Adverb
Church of Rome	Yes	No	No	No
St. John Chrysostom	Yes	No	No	No

Church of Rome (noun)	St. John Chrysostom (noun)
the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy	(Roman Catholic Church) a Church Father who was a great preacher and bishop of Constantinople; a saint and Doctor of the Church (347-407)