Synonyms of fiend

Noun

1. monster, fiend, devil, demon, ogre, unpleasant person, disagreeable person

usage: a cruel wicked and inhuman person

2. devil, fiend, demon, daemon, daimon, evil spirit

usage: an evil supernatural being

3. fanatic, fiend, enthusiast, partisan, partizan

usage: a person motivated by irrational enthusiasm (as for a cause); "A fanatic is one who can't change his mind and won't change the subject"--Winston Churchill

Definition and meaning of fiend (Dictionary)