Gulf States vs Republic of Iraq

Gulf States and Republic of Iraq both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gulf States	Yes	No	No	No
Republic of Iraq	Yes	No	No	No

Gulf States (noun)	Republic of Iraq (noun)
a region of the United States comprising states bordering the Gulf of Mexico; Alabama and Florida and Louisiana and Mississippi and Texas	a republic in the Middle East in western Asia; the ancient civilization of Mesopotamia was in the area now known as Iraq
the countries in southwestern Asia that border the Persian Gulf