Bisayas vs island

Bisayas and island both are nouns.

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

Bisayas (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