A simple shelter is a structure that provides protection from the elements. Common examples of simple shelters include a SHACK (5 letters), a HUT (3 letters), a TENT (4 letters), a teepee (5 letters), a lean-to (6 letters), and a bird's nest (9 letters). These structures are typically made from natural materials such as wood, canvas, or animal hides. They are often used for camping, hunting, or other outdoor activities.