city vs Nanchang

city and Nanchang both are nouns.

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

city (noun)	Nanchang (noun)
people living in a large densely populated municipality	a walled city in southeastern China on the Gan Jiang
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter