"Powerable" is defined as something that can be powered or energized. However, in the English language, there are several synonyms that can be used to indicate a similar meaning. One option is "energizable", which refers to the ability to provide energy or power to something. Another synonym is "electrifiable", suggesting the capacity to supply electricity or electrical power. Similarly, the term "operable" can be used to describe something that can be set in motion or made functional. Additionally, the word "activatable" can be employed to convey the idea of being able to activate or switch on a particular device or system. Overall, these synonyms offer alternative ways to express the concept of being capable of being powered.