archipelago vs H.I.

archipelago and H.I. both are nouns.

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

archipelago (noun)	H.I. (noun)
a group of many islands in a large body of water	a group of volcanic and coral islands in the central Pacific