Al-Iraq vs Republic of Iraq

Al-Iraq and Republic of Iraq both are nouns.

Word	Noun	Adjective	Verb	Adverb
Al-Iraq	Yes	No	No	No
Republic of Iraq	Yes	No	No	No

As nouns, Al-Iraq and Republic of Iraq are synonyms defined as:

Al-Iraq and Republic of Iraq: a republic in the Middle East in western Asia; the ancient civilization of Mesopotamia was in the area now known as Iraq

Other synonyms of Al-Iraq include Irak, Iraq.

Al-Iraq (noun)	Republic of Iraq (noun)
a republic in the Middle East in western Asia; the ancient civilization of Mesopotamia was in the area now known as Iraq	a republic in the Middle East in western Asia; the ancient civilization of Mesopotamia was in the area now known as Iraq