urban center vs Moron

urban center and Moron both are nouns.

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

urban center (noun)	Moron (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in Argentina, to the west of Buenos Aires