urban center vs Blida

urban center and Blida both are nouns.

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

urban center (noun)	Blida (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northern Algeria at the foot of the Atlas Mountains to the southwest of Algiers