metropolis vs Waterbury

metropolis and Waterbury both are nouns.

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

metropolis (noun)	Waterbury (noun)
people living in a large densely populated municipality	a city in west central Connecticut
a large and densely populated urban area; may include several independent administrative districts