Dallas vs urban center

Dallas and urban center both are nouns.

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

Dallas (noun)	urban center (noun)
a large commercial and industrial city in northeastern Texas located in the heart of the northern Texas oil fields	a large and densely populated urban area; may include several independent administrative districts