Power failure is one of the most common issues faced by people all over the world. It refers to a temporary or permanent loss of electricity supply. Power failure can cause inconvenience and even danger in some instances. One synonym for power failure is blackout - a complete loss of power to a particular area or region. Another term for this is an outage, which refers to the interruption of the electricity supply. Brownout is also used to refer to a drop in voltage, leading to a decrease in power that can impact various electrical appliances. Other terms include electrical failure, outage, power disruption, interruption, and power cut.