metropolis vs Messina

metropolis and Messina both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Messina	Yes	No	No	No

metropolis (noun)	Messina (noun)
people living in a large densely populated municipality	a port city in northeastern Sicily on the Strait of Messina
a large and densely populated urban area; may include several independent administrative districts