Waterford vs urban center

Waterford and urban center both are nouns.

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

Waterford (noun)	urban center (noun)
a port city in southern Ireland; famous for glass industry	a large and densely populated urban area; may include several independent administrative districts