45
scary(adjective, unpleasant, awful, terrible, disgusting)
41
horrible(adjective, good, evil, offensive, unpleasant)
39
gruesome(adjective, bad, evil, unpleasant, awful)
38
dreadful(adjective, good, evil, offensive, unpleasant)
37
frightful(adjective, good, evil, unpleasant, awful)
37
hideous(adjective, evil, unpleasant, awful, terrible)
37
appalling(adjective, good, unpleasant, awful, terrible)
36
horrid(adjective, offensive, unpleasant, awful, terrible)
35
awful(adjective, good, bad, offensive, unpleasant)
32
atrocious(adjective, evil, offensive, unpleasant, awful)
31
terrible(adjective, good, bad, evil, offensive)
30
ghastly(adjective, good, bad, unpleasant, awful)
26
grisly(adjective, evil, unpleasant, awful, terrible)
26
monstrous(adjective, awful, terrible, horrible, shocking)
26
shocking(adjective, good, evil, offensive, unpleasant)
25
dire(adjective, awful, terrible, horrible, afraid)
25
horrifying(adjective, awful, terrible, foul, shocking)
22
frightening(adjective, awful, terrible, horrible, shocking)
22
macabre(adjective, bad, awful, disgusting, sinful)
21
abominable(adjective, offensive, unpleasant, awful, terrible)
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APASmart Define. (2015). horrendous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/horrendous/thesaurus/synonyms
ChicagoSmart Define. 2015. "horrendous thesaurus" https://smartdefine.org/horrendous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, horrendous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/horrendous/thesaurus/synonyms>.
MLASmart Define. "horrendous thesaurus" 17 July 2015. Web. 20 September 2026. <https://smartdefine.org/horrendous/thesaurus/synonyms>