urban center vs Oran

urban center and Oran both are nouns.

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

urban center (noun)	Oran (noun)
a large and densely populated urban area; may include several independent administrative districts	a port city in northwestern Algeria and the country's 2nd largest city