urban center vs Wroclaw

urban center and Wroclaw both are nouns.

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

urban center (noun)	Wroclaw (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in southwestern Poland on the Oder