Nurnberg vs urban center

Nurnberg and urban center both are nouns.

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

Nurnberg (noun)	urban center (noun)
a city in southeastern Germany; site of Allied trials of Nazi war criminals (1945-46)	a large and densely populated urban area; may include several independent administrative districts