Swansea vs urban center

Swansea and urban center both are nouns.

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

Swansea (noun)	urban center (noun)
a port city in southern Wales on an inlet of the Bristol Channel	a large and densely populated urban area; may include several independent administrative districts