General synonyms:
* Authority: The right to give orders or make decisions.
* Might: Great strength or force.
* Force: Strength or energy.
* Strength: Physical or mental power.
* Potency: The ability to have a strong effect.
* Influence: The ability to affect someone or something.
* Dominance: The state of being in control.
* Control: The ability to influence or direct something.
* Command: Authority over others.
* Sovereignty: Supreme power or authority.
* Supremacy: The state of being the most powerful.
More specific synonyms:
* Energy: The ability to do work.
* Capacity: The ability to do or contain something.
* Capability: The ability to do something.
* Potentiality: The state of being possible.
* Forcefulness: The quality of being powerful.
* Potency: The strength or effectiveness of something.
* Magnitude: Great size or importance.
* Influence: The ability to affect something or someone.
* Preeminence: The state of being superior.
* Eminence: High rank or distinction.
* Authority: The right to give orders or make decisions.
Synonyms related to electricity:
* Voltage: The electrical potential difference between two points.
* Wattage: The rate at which electrical energy is transferred.
* Amperage: The rate at which electrical charge flows.
Synonyms related to politics:
* Might: The power of a nation or group.
* Influence: The ability of a nation or group to affect others.
* Dominance: The state of being the most powerful nation or group.
* Hegemony: The dominance of one group over others.
* Authority: The right of a government to rule.
The best synonym for "power" will depend on the specific context in which you are using the word.