metropolis vs Milwaukee

metropolis and Milwaukee both are nouns.

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

metropolis (noun)	Milwaukee (noun)
people living in a large densely populated municipality	largest city of Wisconsin; located in southeastern Wisconsin on the western shore of Lake Michigan; a flourishing agricultural center known for its breweries
a large and densely populated urban area; may include several independent administrative districts