Winston-Salem vs urban center

Winston-Salem and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Winston-Salem	Yes	No	No	No
urban center	Yes	No	No	No

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