Galvanometers are instruments that measure electrical current and movement. Some synonyms for galvanometers include ampere meters, ammeters, and current meters. These instruments are used to measure the amount of current flowing through an electrical circuit or system. Another synonym for galvanometers is voltmeter, which measures the voltage or potential difference between two points in an electrical system. Galvanometers are commonly used in scientific research, engineering, and industrial applications. They are also used in medical applications, such as electrocardiography, to measure the electrical activity of the heart. Overall, there are several synonyms for galvanometers that refer to instruments for measuring electrical currents and movements.