Anti-war is a term used to describe someone or something that is against war or the use of military force. There are several synonyms for anti-war including pacifist, peacenik, dove, nonviolent, anti-militarist, and anti-violence. Pacifist refers to a person who believes in peaceful resolution of conflicts and actively opposes war and violence. Peacenik is a slang term used to describe a person who advocates for peace and opposes war. Dove is another term used to describe someone who is against war and conflicts. Anti-militarist refers to a person who is against the military and military activities. Lastly, anti-violence describes someone who is against any form of violence, including war.