Peak voltage is an important term in electrical engineering, which refers to the highest voltage that a circuit or device can handle. However, there are several other terms that can be used as synonyms for peak voltage, such as crest voltage, maximum voltage, or peak-to-peak voltage. Crest voltage refers to the highest point of a waveform, while maximum voltage is the highest voltage that can be measured in a system. Peak-to-peak voltage, on the other hand, refers to the difference between the maximum and minimum voltage in a waveform. Regardless of the term used, peak voltage is a critical factor for ensuring the safe and optimal functioning of electrical equipment.