Molokai Island vs Molokai

Molokai Island and Molokai both are nouns.

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

As nouns, Molokai Island and Molokai are synonyms defined as:

Molokai Island and Molokai: an island of central Hawaii (between Maui and Oahu)

Molokai Island (noun)	Molokai (noun)
an island of central Hawaii (between Maui and Oahu)	an island of central Hawaii (between Maui and Oahu)