urban center vs Zurich

urban center and Zurich both are nouns.

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

urban center (noun)	Zurich (noun)
a large and densely populated urban area; may include several independent administrative districts	the largest city in Switzerland; located in the northern part of the country