urban center vs Charleroi

urban center and Charleroi both are nouns.

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

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