The word conciliators refers to the person who tries to make peace or resolve conflicts. The opposite of this word is "antagonist," which refers to a person who creates conflicts or is hostile towards others. Another antonym for conciliators is "aggressor," which is a person who attacks or initiates conflict. The word "adversary" is also an antonym for conciliators, which refers to a person who opposes or works against the interests of others. Lastly, "opponent" can be considered an antonym for conciliators, which refers to a person who competes or disagrees with others. These words indicate the different attitudes and actions towards conflict resolution.