Ariana vs metropolis

Ariana and metropolis both are nouns.

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

Ariana (noun)	metropolis (noun)
coastal city in northeastern Tunisia	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts