metropolis vs Sapporo

metropolis and Sapporo both are nouns.

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

metropolis (noun)	Sapporo (noun)
people living in a large densely populated municipality	a commercial city in northern Japan on western Hokkaido
a large and densely populated urban area; may include several independent administrative districts