Plexiglass is a type of lightweight, shatter-resistant and transparent plastic material that is widely used in construction, signage, and automotive industries. Though the word 'plexiglass' is often used as a generic term, this material is also known by various other names. The most common synonyms for plexiglass include acrylic glass, perspex, polycarbonate, lucite, and acrylic plastic. These terms are often used interchangeably to refer to any clear plastic sheet material that is similar to plexiglass. Each of these materials has its own unique properties, making them suitable for different applications. However, they all share the qualities of being clear, strong, and long-lasting.