The word "acrimoniousnesses" is a mouthful and can be difficult to say or spell correctly. As such, it's helpful to know some synonyms for this word, as well as its definition. Synonyms for acrimoniousnesses include bitterness, hostility, spitefulness, animosity, rancor, and ill will. These words describe the feeling of dislike or resentment toward someone else. Acrimoniousnesses can often lead to disagreements, arguments, and even fights. It's important to use words carefully and to avoid acrimoniousnesses whenever possible in order to maintain positive relationships with others. If you find yourself in a situation where acrimoniousnesses are present, it's best to try and resolve the conflict peacefully and constructively.