4
pitiless(adjective, nasty, harsh, violent, cruel)
4
unmerciful(adjective, pitiless)
3
barbarous(adjective, evil, nasty, harsh, violent)
3
beastly(adjective, harsh, violent, vicious, fierce)
3
bestial(adjective, evil, nasty, harsh, violent)
3
bloody(adjective, harsh, violent, cruel, vicious)
3
clairvoyant(adjective, extraordinary, unusual, wonderful, marvelous)
3
cutthroat(adjective, pitiless)
3
dog-eat-dog(adjective, pitiless)
3
energetic(adjective, moving, active, full, animated)
3
execrable(adjective, wicked, demonic, diabolical)
3
fell(adjective, harsh, violent, cruel, vicious)
3
feral(adjective, violent, vicious, fierce, unrestrained)
3
ferocious(adjective, evil, nasty, harsh, violent)
3
fierce(adjective, evil, nasty, harsh, violent)
3
hardhearted(adjective, pitiless)
3
inhuman(adjective, evil, nasty, harsh, violent)
3
malevolent(adjective, evil, nasty, harsh, violent)
3
murderous(adjective, harsh, violent, cruel, vicious)
3
rabid(adjective, harsh, violent, cruel, vicious)
11 years ago|5.3k views|share |citing 
APASmart Define. (2015). demoniac thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/demoniac/thesaurus/synonyms
ChicagoSmart Define. 2015. "demoniac thesaurus" https://smartdefine.org/demoniac/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, demoniac thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/demoniac/thesaurus/synonyms>.
MLASmart Define. "demoniac thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/demoniac/thesaurus/synonyms>