Nonbelligerent is a word that means not participating in war or fighting. However, there are several synonyms that can be used to convey this same meaning. "Neutral" means not taking sides in a conflict. "Peaceful" means characterized by the absence of war or violence. "Pacifist" refers to a person who believes in the principle of peacefulness and opposes war or violence. "Non-combatant" means a person who is not involved in armed conflict. "Unarmed" refers to someone who is not equipped with weapons. "Non-hostile" means not showing hostility or aggression. All of these words can be substituted for nonbelligerent, depending on the context of the sentence.