urban center vs Oxford

urban center and Oxford both are nouns.

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

urban center (noun)	Oxford (noun)
a large and densely populated urban area; may include several independent administrative districts	a university in Oxford, England
	a city in southern England to the northwest of London; site of Oxford University
	a university town in northern Mississippi; home of William Faulkner