Overactivity can result in exhaustion and stress, so finding synonyms is essential to communicate clearly. One alternative for overactivity is hyperactivity, which suggests excessive energy or excitement. Another word that conveys excessive activity is agitation, which carries connotations of restlessness and irritation. Mania is another synonym for overactivity, and it implies extreme enthusiasm or infatuation. Busybody is a word that implies being too nosy or meddling, which could apply to overactivity in the sense of over involvement in other people's business. Lastly, thrum could work as a synonym for overactivity, indicating a sense of buzzing, humming or running around aimlessly.