urban center vs Al Hudaydah

urban center and Al Hudaydah both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Al Hudaydah	Yes	No	No	No

urban center (noun)	Al Hudaydah (noun)
a large and densely populated urban area; may include several independent administrative districts	an important port in Yemen on the Red Sea