Beaverboard refers to a generic term for a lightweight building material made from wood pulp and adhesive. It was a popular choice for construction in the first half of the 20th century. However, there are several alternative terms for this material. These synonyms often vary by region and time period. Some common synonyms include fibrolite, caneite, and masonite. Other terms include pressboard, hardboard, and composition board. Despite the variation in names, all these materials share similar characteristics, such as being lightweight, affordable, and easy to work with during construction. While most of these materials are no longer widely used today, they played a key role in the development of modern construction methods.