metropolis vs Mwanza

metropolis and Mwanza both are nouns.

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

metropolis (noun)	Mwanza (noun)
people living in a large densely populated municipality	a city in northern Tanzania on Lake Victoria
a large and densely populated urban area; may include several independent administrative districts