Persia vs Arab states of the Persian Gulf

Persia and Arab states of the Persian Gulf both are nouns.

Word	Noun	Adjective	Verb	Adverb
Persia	Yes	No	No	No
Arab states of the Persian Gulf	Yes	No	No	No

Persia (noun)	Arab states of the Persian Gulf (noun)
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