Stick-on is a term used to describe a variety of adhesive products. The term can be broken down into six different crossword solutions: ADD (3 letters), APPEND (6 letters), PASTE (5 letters), ATTACH (6 letters), AFFIX (5 letters), and DECAL (5 letters). Each of these terms refers to a different type of adhesive product, such as stickers, labels, or decals. All of these products are designed to be easily applied to a variety of surfaces and can be removed without leaving any residue.