Bahrein vs island

Bahrein and island both are nouns.

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

Bahrein (noun)	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	a zone or area resembling an island
an island in the Persian Gulf	a land mass (smaller than a continent) that is surrounded by water