Hardhat is a term commonly used to refer to a safety helmet or protective headgear worn by workers in construction, industrial or engineering fields. However, there are other synonyms used interchangeably with hardhat, such as safety helmet, construction hat, work helmet, or industrial helmet. These synonyms serve the same purpose of providing protection to the user's head from falling objects, impact, or electric hazards. Depending on the industry or job function, the term used may vary, but they all indicate the need for safety headgear on worksites. Employers must ensure that their employees are always wearing appropriate protective gear, whether it is a hardhat or any other synonym thereof.