Visayan Islands vs Bisayas

Visayan Islands and Bisayas both are nouns.

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

As nouns, Visayan Islands and Bisayas are synonyms defined as:

Visayan Islands and Bisayas: group of islands in the central Philippines

Other synonyms of Visayan Islands include Visayas.

Visayan Islands (noun)	Bisayas (noun)
group of islands in the central Philippines	group of islands in the central Philippines