city vs Memphis

city and Memphis both are nouns.

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

city (noun)	Memphis (noun)
people living in a large densely populated municipality	largest city of Tennessee; located in southwestern Tennessee on bluffs overlooking the Mississippi River
a large and densely populated urban area; may include several independent administrative districts	an ancient city of Egypt on the Nile (south of Cairo)
an incorporated administrative district established by state charter