metropolis vs Yokohama

metropolis and Yokohama both are nouns.

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

metropolis (noun)	Yokohama (noun)
people living in a large densely populated municipality	port city on southeastern Honshu in central Japan
a large and densely populated urban area; may include several independent administrative districts