urban center vs civic center

urban center and civic center both are nouns.

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

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