island vs Aegadean Isles

island and Aegadean Isles both are nouns.

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

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