Erie vs metropolis

Erie and metropolis both are nouns.

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

Erie (noun)	metropolis (noun)
a port city on Lake Erie in northwestern Pennsylvania	people living in a large densely populated municipality
the 4th largest of the Great Lakes; it is linked to the Hudson River by the New York State Barge Canal	a large and densely populated urban area; may include several independent administrative districts
a member of an Iroquoian people formerly living on the south shore of Lake Erie in northern Ohio and northwest Pennsylvania and western New York