metropolis vs Mbeya

metropolis and Mbeya both are nouns.

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

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