The term 'Liner Parts' refers to the components of a ship or boat. The five-letter solution for this crossword is 'DECKS', which are the horizontal surfaces on a ship or boat that provide a platform for passengers and crew. DECKS are typically made of wood, metal, or fiberglass and are usually located above the waterline. They provide access to different areas of the vessel, such as the bridge, cabins, and cargo holds.