Synonyms for Demoniacal (same or very similar meaning)
WordNet sense 1 (in a murderous frenzy as if possessed by a demon):
amok, amuck, berserk, demoniac, possessedWordNet sense 2 (afflicted with or characteristic of mental derangement):
insaneWordNet sense 3 (troubled emotionally and usually deeply):
agitatedFrom the ODE community, based on WordNetadd/edit