Omiya vs metropolis

Omiya and metropolis both are nouns.

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

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