The term 'Castaway Abodes' refers to the makeshift dwellings that are constructed by people who are stranded on an island or in a remote location. The crossword solution for this term is 'HUTS', which are small, simple structures that are typically made from natural materials such as wood, leaves, and grass. HUTS are often used as temporary shelters by castaways, providing them with protection from the elements and a place to rest.