Concepcion vs metropolis

Concepcion and metropolis both are nouns.

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

Concepcion (noun)	metropolis (noun)
an industrial city in Chile to the south of Santiago	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts