urban center vs Haiphong

urban center and Haiphong both are nouns.

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

urban center (noun)	Haiphong (noun)
a large and densely populated urban area; may include several independent administrative districts	a port city in northern Vietnam; industrial center