Aegean island vs Aegean

Aegean island and Aegean both are nouns.

Word	Noun	Adjective	Verb	Adverb
Aegean island	Yes	No	No	No
Aegean	Yes	Yes	No	No

Aegean island (noun)	Aegean (noun)
an island in the Aegean Sea	an arm of the Mediterranean between Greece and Turkey; a main trade route for the ancient civilizations of Crete and Greece and Rome and Persia

Aegean island (adjective)	Aegean (adjective)
	of or relating to or bordering the Aegean Sea
	of or relating to or characteristic of the prehistoric Aegean civilization