Arhus vs metropolis

Arhus and metropolis both are nouns.

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

Arhus (noun)	metropolis (noun)
port city of Denmark in eastern Jutland	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts