city vs Buffalo

city and Buffalo both are nouns.

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

city (noun)	Buffalo (noun)
people living in a large densely populated municipality	a city on Lake Erie in western New York (near Niagara Falls)
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter