There are several synonyms for the term "power off" that can help convey the action of shutting down. One common alternative is "turn off", which is straightforward and easily understood. Another synonym is "shut down", which is often used in the context of computers or machines. Additionally, "switch off" is a popular phrase when referring to disconnecting an electronic device. Alternatives such as "cut off" and "power down" can also be used interchangeably. Overall, these synonyms effectively convey the act of powering off or shutting down various devices and can be utilized depending on the context and desired emphasis.