island vs Maui

island and Maui both are nouns.

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

island (noun)	Maui (noun)
a zone or area resembling an island	the second largest of the Hawaiian Islands
a land mass (smaller than a continent) that is surrounded by water