96 entries under dreadful topic. ×

41
ominous(adjective, person, appearance, mean, bad)
34
menacing(adjective, person, sad, dark, unpleasant)
26
evil(adjective, mean, bad, wrong, evil)
26
malevolent(adjective, person, mean, bad, wrong)
23
wicked(adjective, mean, bad, wrong, evil)
21
threatening(adjective, person, mean, bad, wrong)
19
baleful(adjective, nasty, sorrow, awful, terrible)
17
grim(adjective, person, appearance, sad, sorrow)
17
spiteful(adjective, person, evil, rough, nasty)
16
dark(adjective, evil, obscure, rough, nasty)
16
mean(adjective, person, evil, nasty, harsh)
13
base(adjective, unpleasant, corrupt, wicked, horrible)
12
gloomy(adjective, hard, obscure, rough, nasty)
11
forbidding(adjective, person, appearance, rough, nasty)
10
angry(adjective, state, characteristic, person, unpleasant)
9
dour(adjective, person, rough, nasty, dark)
8
atrocious(adjective, evil, awful, terrible)
8
sullen(adjective, mean, bad, wrong, evil)
8
ugly(adjective, person, unpleasant, feelings, horrible)
8
wretched(adjective, sad, unhappy, unpleasant, horrible)
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APASmart Define. (2016). sinister thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sinister/thesaurus/synonyms
ChicagoSmart Define. 2016. "sinister thesaurus" https://smartdefine.org/sinister/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, sinister thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sinister/thesaurus/synonyms>.
MLASmart Define. "sinister thesaurus" 3 April 2016. Web. 24 September 2026. <https://smartdefine.org/sinister/thesaurus/synonyms>