South Bend vs metropolis

South Bend and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
South Bend	Yes	No	No	No
metropolis	Yes	No	No	No

South Bend (noun)	metropolis (noun)
a city in northern Indiana	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts