The term SPACE ON A LINER is solved by the crossword solution CABIN, which is a five-letter word. A CABIN is a private room on a ship or airplane, typically one of several located below the main deck. It is usually used as a sleeping area for passengers and crew members. Cabins are also used for storage, entertainment, and other activities. On a liner, cabins are typically located in the lower decks and provide passengers with a comfortable and private space to relax during their voyage.