Buffalo vs metropolis

Buffalo and metropolis both are nouns.

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

Buffalo (noun)	metropolis (noun)
a city on Lake Erie in western New York (near Niagara Falls)	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts