metropolis vs Erie

metropolis and Erie both are nouns.

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

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