city vs Miami

city and Miami both are nouns.

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

city (noun)	Miami (noun)
people living in a large densely populated municipality	a city and resort in southeastern Florida on Biscayne Bay; the best known city in Florida; a haven for retirees and a refuge for Cubans fleeing Castro
a large and densely populated urban area; may include several independent administrative districts	a member of the extinct Algonquian people formerly living in northern Indiana and southern Michigan
an incorporated administrative district established by state charter