metropolis vs Varna

metropolis and Varna both are nouns.

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

metropolis (noun)	Varna (noun)
people living in a large densely populated municipality	a port city in northeastern Bulgaria on the Black Sea
a large and densely populated urban area; may include several independent administrative districts