The phrase "haddest at each other" does not really have a direct antonym since it is not an established term. However, we can suggest some alternative phrases that may convey the opposite idea, such as "getting along," "working together," "united," "collaborating," "cooperating," "harmonious," or "in agreement." These terms imply a positive and friendly relationship between two or more individuals or groups, rather than a confrontational or antagonistic one. By using these antonyms to "haddest at each other," we can describe a peaceful and productive exchange of ideas or actions that brings people closer together rather than driving them apart.