metropolis vs Durango City

metropolis and Durango City both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Durango City	Yes	No	No	No

metropolis (noun)	Durango City (noun)
people living in a large densely populated municipality	a city in north central Mexico; mining center
a large and densely populated urban area; may include several independent administrative districts