Arab states of the Persian Gulf vs Gulf States

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

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

As nouns, Arab states of the Persian Gulf and Gulf States are synonyms defined as:

Arab states of the Persian Gulf and Gulf States: the countries in southwestern Asia that border the Persian Gulf

Arab states of the Persian Gulf (noun)	Gulf States (noun)
the countries in southwestern Asia that border the Persian Gulf	a region of the United States comprising states bordering the Gulf of Mexico; Alabama and Florida and Louisiana and Mississippi and Texas
	the countries in southwestern Asia that border the Persian Gulf