Antwerp vs urban center

Antwerp and urban center both are nouns.

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

Antwerp (noun)	urban center (noun)
a busy port and financial center in northern Belgium on the Scheldt river; it has long been a center for the diamond industry and the first stock exchange was opened there in 1460	a large and densely populated urban area; may include several independent administrative districts