Visayan Islands vs island

Visayan Islands and island both are nouns.

Word	Noun	Adjective	Verb	Adverb
Visayan Islands	Yes	No	No	No
island	Yes	No	No	No

Visayan Islands (noun)	island (noun)
group of islands in the central Philippines	a zone or area resembling an island
	a land mass (smaller than a continent) that is surrounded by water