urban center vs Newport News

urban center and Newport News both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Newport News	Yes	No	No	No

urban center (noun)	Newport News (noun)
a large and densely populated urban area; may include several independent administrative districts	a port city in southeastern Virginia at the mouth of the James River off Hampton Roads; large shipyards