Bahrein Island vs Bahrain

Bahrein Island and Bahrain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bahrein Island	Yes	No	No	No
Bahrain	Yes	No	No	No

As nouns, Bahrein Island and Bahrain are synonyms defined as:

Other synonyms of Bahrein Island include Bahrain Island, Bahrein.

Bahrein Island (noun)	Bahrain (noun)
an island in the Persian Gulf	an island country in the Persian Gulf off the coast of Saudi Arabia; oil revenues funded progressive programs until reserves were exhausted in 1970s
	an island in the Persian Gulf