urban center vs Leon

urban center and Leon both are nouns.

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

urban center (noun)	Leon (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in central Mexico, in the state Guanajuato
	a city in northwestern Spain at the foot of the Cantabrian Mountains
	a historical area and former kingdom in northwestern Spain