Chittagong vs urban center

Chittagong and urban center both are nouns.

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

Chittagong (noun)	urban center (noun)
a port city and industrial center in southeastern Bangladesh on the Bay of Bengal	a large and densely populated urban area; may include several independent administrative districts