Aegadean Isles vs Aegadian Islands

Aegadean Isles and Aegadian Islands both are nouns.

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

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

Aegadean Isles and Aegadian Islands: 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

Other synonyms of Aegadean Isles include Aegates Isles.

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

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

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

Aegadean Isles (noun)	Aegadian Islands (noun)
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	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	a group of islands off the west coast of Sicily in the Mediterranean