Molokai vs Molokai Island

Molokai and Molokai Island both are nouns.

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

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

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

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