kratocracy
A government established by the forceful or cunning seizure of power and maintained by strength.
[…] as the cover for plutocracy is replaced by timocracy and by the one-man kratocracy which we call dictatorship.
Where it comes from
From Ancient Greek κρᾰ́τος (krắtos, “strength, might”) + -cracy.
Adapted from the Wiktionary entry kratocracy (CC BY-SA 4.0).