metropolis vs Montego Bay

metropolis and Montego Bay both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Montego Bay	Yes	No	No	No

metropolis (noun)	Montego Bay (noun)
people living in a large densely populated municipality	port and resort city in northwestern Jamaica
a large and densely populated urban area; may include several independent administrative districts