island vs archipelago

island and archipelago both are nouns.

Word	Noun	Adjective	Verb	Adverb
island	Yes	No	No	No
archipelago	Yes	No	No	No

island (noun)	archipelago (noun)
a zone or area resembling an island	a group of many islands in a large body of water
a land mass (smaller than a continent) that is surrounded by water