A backplate can have multiple synonyms depending on the context and usage. In engineering, a backplate can be referred to as a mounting plate, which is used to secure various components like a motherboard, power supply, or storage device. Another term used for the mounting plate is a backboard. Similarly, the term back panel or rear panel can also be used to describe the backplate. In the context of sports, backplate can be referred to as an equipment accessory, which provides additional protection during contact sports. In this scenario, the backplate is also known as a spine pad, back guard, back shield, or back protector.