Hard rubber, also known as ebonite (7 letters), is a type of rubber that is harder and more durable than natural rubber. It is often used in the production of electrical insulation, phonograph records, and bowling balls. MASSEUR (7 letters) is a term used to describe someone who provides massage therapy. Massage therapy is a form of physical therapy that uses manual techniques to manipulate the soft tissues of the body to improve health and well-being.