metropolis vs Greensboro

metropolis and Greensboro both are nouns.

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

metropolis (noun)	Greensboro (noun)
people living in a large densely populated municipality	a city of north central North Carolina, the city with the third-largest population in North Carolina
a large and densely populated urban area; may include several independent administrative districts