96 entries under dreadful topic. ×
| disgusting(adjective, nasty, unpleasant, awful, horrible) | |
| formidable(adjective, appearance, unpleasant, awful, terrible) | |
| low-down(adjective, unpleasant, violent, corrupt, horrible) | |
| noisome(adjective, bad, evil, unpleasant, wicked) | |
| surly(adjective, mean, bad, wrong, evil) | |
| violent(adjective, unpleasant, horrible, shocking, disagreeable) | |
| rough(adjective, nasty, dark, unpleasant, vicious) | |
| abysmal(awful, terrible) | |
| astounding(awful, terrible) | |
| bellicose(adjective, rough, nasty, dark, unpleasant) | |
| crabbed(adjective, rough, nasty, dark, unpleasant) | |
| crabby(adjective, rough, nasty, dark, unpleasant) | |
| distasteful(adjective, unpleasant, horrible, disagreeable) | |
| filthy(adjective, unpleasant, horrible, disagreeable) | |
| grievous(adjective, unpleasant, awful, terrible, horrible) | |
| ignoble(adjective, unpleasant, horrible, disagreeable) | |
| low(adjective, unpleasant, horrible, disagreeable) | |
| major(adjective, unpleasant, horrible, disagreeable) | |
| messy(adjective, unpleasant, horrible, disagreeable) | |
| nauseous(adjective, unpleasant, horrible, disagreeable) |
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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> |