metropolis vs Medellin

metropolis and Medellin both are nouns.

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

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