Sparta vs metropolis

Sparta and metropolis both are nouns.

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

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