Nan-chang vs metropolis

Nan-chang and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nan-chang	Yes	No	No	No
metropolis	Yes	No	No	No

Nan-chang (noun)	metropolis (noun)
a walled city in southeastern China on the Gan Jiang	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts