Charleroi vs urban center

Charleroi and urban center both are nouns.

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

Charleroi (noun)	urban center (noun)
city in southwestern Belgium; center of an industrial region	a large and densely populated urban area; may include several independent administrative districts