Italy vs Bay of Naples

Italy and Bay of Naples both are nouns.

Word	Noun	Adjective	Verb	Adverb
Italy	Yes	No	No	No
Bay of Naples	Yes	No	No	No

Italy (noun)	Bay of Naples (noun)
a republic in southern Europe on the Italian Peninsula; was the core of the Roman Republic and the Roman Empire between the 4th century BC and the 5th century AD	an arm of the Tyrrhenian Sea at Naples