Bahrain Island vs island

Bahrain Island and island both are nouns.

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

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