Bahrain vs Bahrain Island

Bahrain and Bahrain Island both are nouns.

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

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

Other synonyms of Bahrain include Bahrein, Bahrein Island.

Bahrain (noun)	Bahrain 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