St. Irenaeus vs Church of Rome

St. Irenaeus and Church of Rome both are nouns.

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

St. Irenaeus (noun)	Church of Rome (noun)
Greek theologian who was bishop of Lyons and an antiheretical writer; a saint and Doctor of the Church (circa 130-200)	the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy