Tacoma vs urban center

Tacoma and urban center both are nouns.

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

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