urban center vs Genoa

urban center and Genoa both are nouns.

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

urban center (noun)	Genoa (noun)
a large and densely populated urban area; may include several independent administrative districts	a seaport in northwestern Italy; provincial capital of Liguria