urban center vs Leeds

urban center and Leeds both are nouns.

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

urban center (noun)	Leeds (noun)
a large and densely populated urban area; may include several independent administrative districts	a city on the River Aire in West Yorkshire in northern England; a center of the clothing industry