Chemnitz vs urban center

Chemnitz and urban center both are nouns.

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

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