Aegadean Islands vs Aegadian Islands

Aegadean Islands and Aegadian Islands both are nouns.

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

As nouns, Aegadean Islands and Aegadian Islands are synonyms defined as:

Aegadean Islands and Aegadian Islands: a group of islands off the west coast of Sicily in the Mediterranean

Other synonyms of Aegadean Islands include Aegadean Isles, Aegates, Egadi Islands, Isole Egadi.

Aegadean Islands (noun)	Aegadian Islands (noun)
a group of islands off the west coast of Sicily in the Mediterranean	islands west of Sicily (now known as the Egadi Islands) where the Romans won a naval victory over the Carthaginians that ended the first Punic War in 241 BC
	a group of islands off the west coast of Sicily in the Mediterranean