Nyala vs metropolis

Nyala and metropolis both are nouns.

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

Nyala (noun)	metropolis (noun)
city in Sudan	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts