The term ONE WHO WORKS ON WALLS can be described by two crossword solutions: PAPERER (7 letters) and MURALIST (8 letters). A paperer is someone who hangs wallpaper, which is a decorative paper used to cover and decorate the interior walls of a room. A muralist is an artist who paints large-scale works on walls, often in public places. Both paperers and muralists are responsible for creating aesthetically pleasing walls.