city vs Oxford

city and Oxford both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
Oxford	Yes	No	No	No

city (noun)	Oxford (noun)
people living in a large densely populated municipality	a university in Oxford, England
a large and densely populated urban area; may include several independent administrative districts	a city in southern England to the northwest of London; site of Oxford University
an incorporated administrative district established by state charter	a university town in northern Mississippi; home of William Faulkner