urban center vs Greensboro

urban center and Greensboro both are nouns.

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

urban center (noun)	Greensboro (noun)
a large and densely populated urban area; may include several independent administrative districts	a city of north central North Carolina, the city with the third-largest population in North Carolina