Hawaii Island vs island

Hawaii Island and island both are nouns.

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

Hawaii Island (noun)	island (noun)
the largest and southernmost of the Hawaii islands; has several volcanic peaks	a zone or area resembling an island
	a land mass (smaller than a continent) that is surrounded by water