Cape Town vs urban center

Cape Town and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cape Town	Yes	No	No	No
urban center	Yes	No	No	No

Cape Town (noun)	urban center (noun)
port city in southwestern South Africa; the seat of the legislative branch of the government of South Africa	a large and densely populated urban area; may include several independent administrative districts