Cambridge vs urban center

Cambridge and urban center both are nouns.

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

Cambridge (noun)	urban center (noun)
a university in Cambridge, England	a large and densely populated urban area; may include several independent administrative districts
a city in eastern England on the River Cam; site of Cambridge University
a city in Massachusetts just to the north of Boston; site of Harvard University and the Massachusetts Institute of Technology