metropolis vs Cincinnati

metropolis and Cincinnati both are nouns.

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

metropolis (noun)	Cincinnati (noun)
people living in a large densely populated municipality	a city in southern Ohio on the Ohio river
a large and densely populated urban area; may include several independent administrative districts