urban center vs Flint

urban center and Flint both are nouns.

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

urban center (noun)	Flint (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in southeast central Michigan near Detroit; automobile manufacturing
	a river in western Georgia that flows generally south to join the Chattahoochee River at the Florida border where they form the Apalachicola River