H.I. vs Kauai

H.I. and Kauai both are nouns.

Word	Noun	Adjective	Verb	Adverb
H.I.	Yes	No	No	No
Kauai	Yes	No	No	No

H.I. (noun)	Kauai (noun)
a group of volcanic and coral islands in the central Pacific	an island of Hawaii to the northwest of Oahu