Precast is a term used in construction industry, which refers to concrete that is cast in a reusable mold or form and then cured in a controlled environment. However, there are several other terms that are commonly used as synonyms for precast, including prefabricated, prebuilt, offsite built, and modular. Prefabricated refers to any construction element that is manufactured off-site, while prebuilt is used to describe elements that are completed in a factory-like setting. Offsite built and modular are more general terms, which can refer to any element that is constructed away from the site of installation. These synonyms are often used interchangeably, depending on the specific context of the construction industry.