Sandwich Islands sand·wic·his·lands uncommon noun 1. a group of volcanic and coral islands in the central Pacific SynonymsHawaiian IslandsSandwich Islands Related words Broader terms archipelago Parts Polynesia Part of HawaiiKahoolaweKauaiLanaiMauiMolokaiNihau WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.