polymethyl methacrylate: a transparent plastic used as a substitute for glass
acrylic: a glassy thermoplastic; can be cast and molded or used in coatings and adhesives
nim: game in which matchsticks are arranged in rows and players alternately remove one or more of them; in some versions the object is to take the last remaining matchstick on the table and in other versions the object is to avoid taking the last remaining matchstick on the table