17
evil(adjective, nasty, unpleasant, awful, dirty)
17
odious(adjective, evil, nasty, offensive, unpleasant)
17
repellent(adjective, dull, nasty, offensive, unpleasant)
17
tragic(adjective, bad, awful, terrible, horrible)
17
unpleasant(adjective, dull, severe, nasty, tender)
17
wretched(verb, adjective, person, sad, offensive)
16
alarming(adjective, awful, terrible, fear, foul)
16
macabre(adjective, bad, nasty, shocking, atrocious)
16
obnoxious(verb, adjective, person, nasty, offensive)
16
unspeakable(adjective, mean, bad, obscure, unpleasant)
15
execrable(adjective, unpleasant, awful, terrible, disgusting)
15
formidable(adjective, great, unpleasant, awful, terrible)
15
grim(adjective, bad, sad, pain, offensive)
15
outrageous(adjective, severe, evil, nasty, dislike)
15
rotten(adjective, mean, severe, nasty, sad)
14
disagreeable(verb, adjective, person, dull, nasty)
14
dreaded(adjective, awful, terrible, horrible, afraid)
14
harrowing(adjective, pain, awful, terrible, horrible)
14
painful(adjective, tender, awful, terrible, fear)
14
tremendous(adjective, pain, awful, terrible, fear)
10 years ago|30k views|share |citing 
APASmart Define. (2016). dreadful thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/dreadful/thesaurus/synonyms
ChicagoSmart Define. 2016. "dreadful thesaurus" https://smartdefine.org/dreadful/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, dreadful thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/dreadful/thesaurus/synonyms>.
MLASmart Define. "dreadful thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/dreadful/thesaurus/synonyms>