Aarhus vs urban center

Aarhus and urban center both are nouns.

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

Aarhus (noun)	urban center (noun)
port city of Denmark in eastern Jutland	a large and densely populated urban area; may include several independent administrative districts