Polystyrene, a thermoplastic polymer, has several synonyms that are used depending on the context. The term "Styrofoam" is often used as a generic name, but it is actually a specific brand of polystyrene foam. "EPS foam" or "expanded polystyrene foam" are other common names for this material, which is commonly used for insulation and packaging. "PSP" or "polystyrene plastic" are other terms that can be used to describe the material, which is also used for making disposable plates, cups, and cutlery. Additionally, "polyfoam" or "thermocol" are regional synonyms for polystyrene. Despite its many names, it is important to note that polystyrene is non-biodegradable and can have negative environmental impacts, leading to calls for alternative materials to be used.