Roll bars are essential safety features in cars that protect the driver and passengers in case of a rollover or crash. While the term "roll bar" is commonly used, there are several other synonyms that can refer to the same structure. Some of these are roll cage, roll hoop, safety cage, anti-roll bar, and anti-roll cage. These terms are often used interchangeably and the type of term used may vary based on the type of car or the purpose of the roll bars. Ultimately, whether called a roll bar, roll cage, or any other synonym, the function remains the same- to save lives.