Impulsive insanity can be defined as an uncontrollable and irrational behavior that is driven by sudden urges or impulses. However, there are several other synonyms that can be used to describe this type of behavior. One such synonym is recklessness, which refers to acting without thinking of the consequences. Another synonym is impulsivity, which describes a lack of self-control or the tendency to act on impulses without considering the potential outcomes. Other synonyms for impulsive insanity include irrationality, impulsiveness, compulsiveness, and erratic behavior. Each of these words conveys a sense of urgency and impulsivity, highlighting the lack of forethought or rationalization that can accompany impulsive actions.