Room decoration is a popular way to spruce up any living space. One of the most common elements of room decoration is WALLPAPER, which is a nine-letter word. WALLPAPER is a decorative paper that is used to cover walls and other surfaces in a room. It can be used to create a unique look and feel in a room, and it is available in a variety of colors, patterns, and textures. WALLPAPER can also be used to hide imperfections in walls or to add texture to a room.