Aegadean Islands vs island

Aegadean Islands and island both are nouns.

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

Aegadean Islands (noun)	island (noun)
a group of islands off the west coast of Sicily in the Mediterranean	a zone or area resembling an island
	a land mass (smaller than a continent) that is surrounded by water