A hairpiece is a type of head covering that is used to cover up baldness or thinning hair. The term can refer to a RUG (3 letters), TOUPEE (6 letters), WIG (3 letters), RAT (3 letters), or SWITCH (6 letters). A RUG is a small piece of fabric that is worn on the head, while a TOUPEE is a small WIG that is attached to the scalp with adhesive. A WIG is a full head of hair made from synthetic or human hair and is usually secured with clips or combs. A RAT is a small piece of hair that is used to add volume to the hair, while a SWITCH is a short piece of hair that is used to add length.