Bishop of Rome vs Ambrogio Damiano Achille Ratti

Bishop of Rome and Ambrogio Damiano Achille Ratti both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bishop of Rome	Yes	No	No	No
Ambrogio Damiano Achille Ratti	Yes	No	No	No

Bishop of Rome (noun)	Ambrogio Damiano Achille Ratti (noun)
the head of the Roman Catholic Church	pope who signed a treaty with Mussolini recognizing the Vatican City as an independent state (1857-1939)