urban center vs Casablanca

urban center and Casablanca both are nouns.

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

urban center (noun)	Casablanca (noun)
a large and densely populated urban area; may include several independent administrative districts	a port on the Atlantic and the largest city of Morocco