metropolis vs Maracaibo

metropolis and Maracaibo both are nouns.

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

metropolis (noun)	Maracaibo (noun)
people living in a large densely populated municipality	a port city in northwestern Venezuela; a major oil center
a large and densely populated urban area; may include several independent administrative districts