Bahrein vs Bahrein Island

Bahrein and Bahrein Island both are nouns.

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

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

Other synonyms of Bahrein include Bahrain, Bahrain Island.

Bahrein (noun)	Bahrein Island (noun)
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
an island in the Persian Gulf