civic center vs urban center

civic center and urban center both are nouns.

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

civic center (noun)	urban center (noun)
a center where the members of a community can gather for social or cultural activities	a large and densely populated urban area; may include several independent administrative districts
the center of a city