urban center vs Chemnitz

urban center and Chemnitz both are nouns.

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

urban center (noun)	Chemnitz (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in east central Germany; formerly called Karl-Marx-Stadt until 1990; noted for textile manufacturing