city vs Sparta

city and Sparta both are nouns.

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

city (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
an incorporated administrative district established by state charter