urban center vs Tacoma

urban center and Tacoma both are nouns.

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

urban center (noun)	Tacoma (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in west central Washington on an arm of Puget Sound to the south of Seattle