A helmet is an essential protective gear that is worn to protect the head from injuries. There are several different synonyms for the word helmet, such as headgear, hard hat, safety hat, protective cap, brain bucket, crash hat, and safety helm. Headgear is a general term for any kind of equipment that is worn on the head, while the hard hat is typically used in construction work. The term safety hat is used in industrial settings, and the protective cap is commonly worn in sports such as hockey and football. A brain bucket is a slang term used to describe a motorcycle helmet, while crash hat and safety helm are also used in the field of motorsports.