Molokai vs island

Molokai and island both are nouns.

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

Molokai (noun)	island (noun)
an island of central Hawaii (between Maui and Oahu)	a zone or area resembling an island
	a land mass (smaller than a continent) that is surrounded by water