6
ungodly
6
unholy
6
vile(adjective, evil, wicked, immoral, mysterious)
5
abominable(adjective, inexpedience)
5
cruel
5
dark(adjective, evil, mysterious, threatening, nefarious)
5
demoniacal(adjective, evil, malevolence, vice, crazed)
5
fiendlike(malevolence, vice)
5
foul(adjective, evil, wicked, immoral, mysterious)
5
goddamn
5
impious(adjective, evil, vile, crazed, devilish)
5
nether(adjective, damned, underworld)
5
plutonian(hellish, plutonic)
5
sheer(adjective, complete, total, pure, definite)
5
unqualified(adjective, complete, total, pure, definite)
4
awful
4
bloody(adjective, like, harsh, violent, cruel)
4
cacodemonic
4
chthonian(adjective, damned, underworld)
4
depraved(adjective, inexpedience)
11 years ago|13k views|share |citing 
APASmart Define. (2015). infernal thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/infernal/thesaurus/synonyms
ChicagoSmart Define. 2015. "infernal thesaurus" https://smartdefine.org/infernal/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, infernal thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/infernal/thesaurus/synonyms>.
MLASmart Define. "infernal thesaurus" 17 July 2015. Web. 22 September 2026. <https://smartdefine.org/infernal/thesaurus/synonyms>