urban center vs Winston-Salem

urban center and Winston-Salem both are nouns.

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

urban center (noun)	Winston-Salem (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 fourth-largest population in North Carolina