Cambridge vs city

Cambridge and city both are nouns.

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

Cambridge (noun)	city (noun)
a university in Cambridge, England	people living in a large densely populated municipality
a city in eastern England on the River Cam; site of Cambridge University	a large and densely populated urban area; may include several independent administrative districts
a city in Massachusetts just to the north of Boston; site of Harvard University and the Massachusetts Institute of Technology	an incorporated administrative district established by state charter