urban center vs Oujda

urban center and Oujda both are nouns.

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

urban center (noun)	Oujda (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northeastern Morocco near the Algerian border