Pressure gauge is a device that is used to measure the pressure of a fluid or gas in a system. However, there are several other terms or phrases that can be used interchangeably to refer to this device. For instance, it can also be referred to as a manometer, pressure meter, pressure indicator, or simply a gauge. Depending on the specific use of the device, other terms such as a vacuum gauge, tire pressure gauge, or digital pressure gauge may be used. Therefore, depending on the context, there are several different synonyms that can be used for the pressure gauge, each with its unique application and use case.