metropolis vs Huambo

metropolis and Huambo both are nouns.

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

metropolis (noun)	Huambo (noun)
people living in a large densely populated municipality	a city in the mountains in western Angola
a large and densely populated urban area; may include several independent administrative districts