urban center vs Annaba

urban center and Annaba both are nouns.

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

urban center (noun)	Annaba (noun)
a large and densely populated urban area; may include several independent administrative districts	a port city of northeastern Algeria near the Tunisian border