CRUDE BUILDING is a term used to describe basic, temporary structures that are often used for shelter or storage. The crossword solutions for this term include HUT (3 letters), SHACK (5 letters), OIL (3 letters), and SHED (4 letters). A HUT is a small, primitive dwelling made of natural materials such as wood, straw, and mud. A SHACK is a small, crudely built house or shelter, usually made of wood. OIL is a flammable liquid derived from petroleum, which can be used to fuel lamps and other sources of light. A SHED is a small, single-story building used for storage or shelter.