A pacifist is someone who believes in and practices nonviolence and peace. The term 'pacifist' can be broken down into five words: PEACEABLE (9 letters), PEACEMAKER (10 letters), nonviolent (10 letters), dove (4 letters), and co (2 letters). PEACEABLE means to be peaceful or tranquil, while a PEACEMAKER is someone who works to bring about peace. Nonviolent means to abstain from using violence, and a dove is a symbol of peace. Co is a shortened form of the word 'COLLABORATE, ' which means to work together. All of these words together describe someone who is committed to peace and nonviolence.