Hawaiian Islands vs H.I.

Hawaiian Islands and H.I. both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hawaiian Islands	Yes	No	No	No
H.I.	Yes	No	No	No

As nouns, Hawaiian Islands and H.I. are synonyms defined as:

Hawaiian Islands and H.I.: a group of volcanic and coral islands in the central Pacific

Other synonyms of Hawaiian Islands include Sandwich Islands.

Hawaiian Islands (noun)	H.I. (noun)
a group of volcanic and coral islands in the central Pacific	a group of volcanic and coral islands in the central Pacific