Palermo vs urban center

Palermo and urban center both are nouns.

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

Palermo (noun)	urban center (noun)
the capital of Sicily; located in northwestern Sicily; an important port for 3000 years	a large and densely populated urban area; may include several independent administrative districts