96 entries under dreadful topic. ×
| vicious(adjective, nasty, unpleasant, negative, wicked) | |
| obnoxious(adjective, evil, rough, nasty, dark) | |
| treacherous(adjective, rough, nasty, dark, unpleasant) | |
| glum(adjective, rough, nasty, dark, unpleasant) | |
| morose(adjective, rough, nasty, sad, dark) | |
| saturnine(adjective, rough, nasty, dark, unpleasant) | |
| sorry(adjective, sad, unhappy, unpleasant, sorrow) | |
| vile(adjective, mean, bad, wrong, evil) | |
| fearful(adjective, awful, terrible, weird) | |
| grave(adjective, unpleasant, sorrow, depress, sadness) | |
| horrible(adjective, obscure, nasty, dark, unpleasant) | |
| monstrous(adjective, evil, awful, terrible) | |
| scandalous(adjective, unpleasant, corrupt, wicked, horrible) | |
| terrible(adjective, appearance, evil, unpleasant, awful) | |
| nasty(adjective, evil, rough, dark, unpleasant) | |
| appalling(awful, terrible) | |
| horrifying(adjective, awful, violent, terrible, shocking) | |
| odious(adjective, person, tough, offensive, dark) | |
| shocking(adjective, appearance, offensive, unpleasant, awful) | |
| unpleasant(adjective, person, mean, hard, severe) |
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| APA | Smart Define. (2016). sinister thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/sinister/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sinister thesaurus" https://smartdefine.org/sinister/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, sinister thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/sinister/thesaurus/synonyms>. |
| MLA | Smart Define. "sinister thesaurus" 3 April 2016. Web. 26 September 2026. <https://smartdefine.org/sinister/thesaurus/synonyms> |