urban center vs Rochester

urban center and Rochester both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Rochester	Yes	No	No	No

urban center (noun)	Rochester (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in western New York; a center of the photographic equipment industry
	a town in southeast Minnesota