metropolis vs Sparta

metropolis and Sparta both are nouns.

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

metropolis (noun)	Sparta (noun)
people living in a large densely populated municipality	an ancient Greek city famous for military prowess; the dominant city of the Peloponnesus prior to the 4th century BC
a large and densely populated urban area; may include several independent administrative districts