Gulf States vs Persia

Gulf States and Persia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gulf States	Yes	No	No	No
Persia	Yes	No	No	No

Gulf States (noun)	Persia (noun)
a region of the United States comprising states bordering the Gulf of Mexico; Alabama and Florida and Louisiana and Mississippi and Texas	a theocratic Islamic republic in the Middle East in western Asia; Iran was the core of the ancient empire that was known as Persia until 1935; rich in oil
the countries in southwestern Asia that border the Persian Gulf	an empire in southern Asia created by Cyrus the Great in the 6th century BC and destroyed by Alexander the Great in the 4th century BC