What is a synonym for tyrant?

Here are some synonyms for tyrant, depending on the nuance you want to convey:

General synonyms:

* Despot

* Oppressor

* Dictator

* Autocrat

* Ruler

* Sovereign

* Monarch

More specific synonyms:

* Cruel: Brute, monster, savage

* Ruthless: Butcher, assassin, executioner

* Unjust: Injustice, oppressor, exploiter

* Controlling: Dominator, controller, manipulator

* Abusive: Abuser, tormentor, persecutor

Figurative synonyms:

* Master

* Lord

* Overlord

* King

The best synonym will depend on the specific context in which you are using it.