Greensboro vs urban center

Greensboro and urban center both are nouns.

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

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