metropolis vs Omiya

metropolis and Omiya both are nouns.

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

metropolis (noun)	Omiya (noun)
people living in a large densely populated municipality	a city of east central Honshu; a suburb of Tokyo
a large and densely populated urban area; may include several independent administrative districts