Phrenetically is an adjective that describes an activity or action that is done in a frenzied, frantic, or hurried manner. Some synonyms for phrenetically include chaotically, rapidly, hectically, frantically, and feverishly. These words all convey a sense of urgency or haste in the way something is done. Other synonyms may include impulsively, impulsively, frenetically, zealously, and passionately. They all suggest an enthusiasm or urgency in the way things are being done. Whether it is work, studying, or enjoying a hobby, doing things phrenetically is not always the most practical way to approach them. But sometimes, it may be necessary, and these synonyms can help convey that sense of urgency or haste.