Tangshan vs metropolis

Tangshan and metropolis both are nouns.

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

Tangshan (noun)	metropolis (noun)
an industrial city of northeastern China in Hebei province	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts