urban center vs Ibadan

urban center and Ibadan both are nouns.

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

urban center (noun)	Ibadan (noun)
a large and densely populated urban area; may include several independent administrative districts	a large Yoruba city in southwestern Nigeria; site of a university