Leon vs urban center

Leon and urban center both are nouns.

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

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