There are several synonyms for the term "power regulator". One of the commonly used synonyms is "voltage regulator", which is an electronic device used to regulate the voltage in a circuit. Another synonym for "power regulator" is "current regulator", which is used to regulate the amount of current flowing through a circuit. A "power controller" is also a synonym for "power regulator" and is used to control the output of a power source. Additionally, "power supply unit" or "PSU" is another synonym for "power regulator". This term is often used to refer to an integrated power supply unit that regulates the voltage and current in a computer system.