The term INTERIOR WALL, LOWER PART OF can be summarized by two crossword solutions: DADO (4 letters) and WAINSCOT (8 letters). A DADO is a decorative panel that is placed on the lower part of an interior wall. It is usually made of wood or stone and is often used to add texture and visual interest to a room. Wainscoting is a type of wall covering that is typically made of wood and is installed on the lower part of an interior wall. It is often used to add a decorative touch to a room and can also provide insulation and soundproofing.