island vs Aran Islands

island and Aran Islands both are nouns.

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

island (noun)	Aran Islands (noun)
a zone or area resembling an island	three small islands belonging to Ireland at the entrance to Galway Bay
a land mass (smaller than a continent) that is surrounded by water