Authority.
Strength manifested in effective action; energy.
Any agent that exercises power.
Powerness.
Powerly.
Powerless.
But we must be sure the power is turned on. – The Electronic Mind Reader by John Blaine
I am at home with my own power. – Bye-Ways by Robert Smythe Hichens
He who has power has right. – The Ego and His Own by Max Stirner