The term 'refueling ship' can be summarized as a vessel that is used to refuel other ships. The crossword solution for this term is 'oiler, ' which is a five-letter word. An oiler is a type of ship that carries fuel oil, lubricating oil, and other petroleum products to refuel other ships. It is also used to transfer fuel from one ship to another. Oiler ships are typically equipped with pumps and hoses to facilitate the transfer of fuel.