Peloponnesian Peninsula vs Sparta

Peloponnesian Peninsula and Sparta both are nouns.

Word	Noun	Adjective	Verb	Adverb
Peloponnesian Peninsula	Yes	No	No	No
Sparta	Yes	No	No	No

Peloponnesian Peninsula (noun)	Sparta (noun)
the southern peninsula of Greece; dominated by Sparta until the 4th century BC	an ancient Greek city famous for military prowess; the dominant city of the Peloponnesus prior to the 4th century BC