11
abhorrent(adjective, severe, nasty, offensive, unpleasant)
11
direful(adjective, awful, terrible, horrible, afraid)
11
loathsome(adjective, severe, evil, nasty, offensive)
11
beastly(adjective, offensive, unpleasant, awful, terrible)
11
fearsome(adjective, bad, awful, disgusting, sinful)
11
hair-raising(adjective, bad, awful, terrible, disgusting)
11
sickening(adjective, awful, terrible, vicious, grim)
11
wicked(adjective, bad, awful, terrible, disgusting)
11
obnoxious(adjective, severe, nasty, offensive, unpleasant)
11
vicious(adjective, awful, terrible, horrible, afraid)
10
nauseating(adjective, awful, terrible, disgusting, grim)
10
grim(adjective, bad, nasty, offensive, unpleasant)
10
grievous(adjective, awful, terrible, horrible, painful)
10
tremendous(adjective, awful, terrible, horrible, afraid)
10
unbearable(adjective, offensive, unpleasant, awful, terrible)
10
wretched(adjective, awful, terrible, horrible, afraid)
9
repugnant(adjective, endured)
9
evil(adjective, endured)
9
extreme(adjective, severe, awful, terrible, serious)
9
insufferable(adjective, painful, endured)
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APASmart Define. (2015). horrendous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/horrendous/thesaurus/synonyms
ChicagoSmart Define. 2015. "horrendous thesaurus" https://smartdefine.org/horrendous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, horrendous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/horrendous/thesaurus/synonyms>.
MLASmart Define. "horrendous thesaurus" 17 July 2015. Web. 25 September 2026. <https://smartdefine.org/horrendous/thesaurus/synonyms>