Manically is an adjective that describes a frenzied or obsessive behavior. There are various synonyms for manically, such as frenziedly, hysterically, frantically, obsessively, zealously, insanely, feverishly, uncontrollably, and hyperactively. These synonyms can be used interchangeably, depending on the context and intended meaning. Frenziedly and hysterically describe a state of extreme excitement or agitation, while frantically and obsessively describe a sense of urgency or compulsion. Zealously, insanely, and feverishly describe a state of intense passion or enthusiasm. Uncontrollably and hyperactively describe a state of extreme energy or restlessness. Whatever synonym is selected, it's important to choose the word that best conveys the intended meaning and tone of the sentence.