urban center vs Nuremberg

urban center and Nuremberg both are nouns.

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

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