island vs Kahoolawe

island and Kahoolawe both are nouns.

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

island (noun)	Kahoolawe (noun)
a zone or area resembling an island	an island of south-central Hawaii
a land mass (smaller than a continent) that is surrounded by water