Cartagena vs metropolis

Cartagena and metropolis both are nouns.

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

Cartagena (noun)	metropolis (noun)
a port in southeastern Spain on the Mediterranean	people living in a large densely populated municipality
a port city in northwestern Colombia on the Caribbean	a large and densely populated urban area; may include several independent administrative districts