Ibadan vs urban center

Ibadan and urban center both are nouns.

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

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