urban center vs Kingston-upon Hull

urban center and Kingston-upon Hull both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Kingston-upon Hull	Yes	No	No	No

urban center (noun)	Kingston-upon Hull (noun)
a large and densely populated urban area; may include several independent administrative districts	a large fishing port in northeastern England