urban center vs Leicester

urban center and Leicester both are nouns.

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

urban center (noun)	Leicester (noun)
a large and densely populated urban area; may include several independent administrative districts	an industrial city in Leicestershire in central England; built on the site of a Roman settlement
	a largely agricultural county in central England