H.I. vs Hawaii Island

H.I. and Hawaii Island both are nouns.

Word	Noun	Adjective	Verb	Adverb
H.I.	Yes	No	No	No
Hawaii Island	Yes	No	No	No

H.I. (noun)	Hawaii Island (noun)
a group of volcanic and coral islands in the central Pacific	the largest and southernmost of the Hawaii islands; has several volcanic peaks