The crossword solution for the term 'Word with 'CASE' or 'WELL'' is STAIR. A STAIR is a set of steps that are used to ascend or descend between different levels of a building, such as between floors in a house or between the ground and first floor of a building. Stairs can be made of wood, metal, stone, or other materials, and can be straight or curved. Stairs are an important part of many buildings, providing access to different levels and allowing people to move between them safely and easily.