What is the antonym for peacemaker?

There isn't a single perfect antonym for "peacemaker." The best word depends on the context, but some possibilities include:

* Troublemaker: This is the most direct opposite, someone who actively stirs up conflict.

* Provocateur: Similar to troublemaker, this refers to someone who deliberately provokes others.

* Warmonger: This specifically refers to someone who advocates for or promotes war.

* Agitator: Someone who stirs up unrest or rebellion.

* Discordant: This describes a person or situation that is full of conflict and disagreement.

* Conflictual: Similar to discordant, this refers to someone or something that is characterized by conflict.

The best word to use will depend on the specific situation and the type of conflict being described.