The term 'TOOTHPASTE TOPPER' can be summarized by the crossword solution of CAP, which is a three letter word. CAP stands for a type of headgear that is typically worn to cover the head and sometimes the neck. It is usually made of fabric or leather and is often used as a fashion accessory. In some cases, it may also serve a functional purpose, such as providing protection from the elements or keeping hair out of the face.