metropolis vs Chongqing

metropolis and Chongqing both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Chongqing	Yes	No	No	No

metropolis (noun)	Chongqing (noun)
people living in a large densely populated municipality	a city in south-central China on the Chang Jiang; a commercial center for western China
a large and densely populated urban area; may include several independent administrative districts