metropolis vs Ariana

metropolis and Ariana both are nouns.

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

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