Annaba vs urban center

Annaba and urban center both are nouns.

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

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