Medellin vs metropolis

Medellin and metropolis both are nouns.

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

Medellin (noun)	metropolis (noun)
city in western Colombia; important coffee center	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts