Demoniac
Part of speech: adjective
Definition: possessed or controlled by a demon. Of or pertaining to demons; demonic.
Part of speech: noun
Definition: One who is possessed or controlled by a demon.
Berserk
Part of speech: noun
Definition: A crazed Norse warrior who fought in a frenzy.
Part of speech: adjective
Definition: Injuriously, maniacally, or furiously violent or out of control.