Misomaniacal is an adjective used to describe someone who has an intense hatred for someone or something. There are several synonyms for the word misomaniacal, including malignant, vengeful, spiteful, resentful, and vindictive. These words express the strong, negative emotions associated with the desire for revenge and the need for retribution. Other synonyms for misomaniacal include obsessive, persistent, and fixated, which capture the persistence with which an individual holds onto their hatred. Ultimately, the word misomaniacal describes a person who has an intense, irrational desire for revenge, often without regard for the consequences of their actions.