Solingen vs urban center

Solingen and urban center both are nouns.

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

Solingen (noun)	urban center (noun)
a city in west central Germany noted for cutlery	a large and densely populated urban area; may include several independent administrative districts