55 entries under terrible topic. ×
| implacable(appearance, hopeless) | |
| inexorable(appearance, hopeless) | |
| intractable(appearance, hopeless) | |
| overwhelming(awful, dreadful) | |
| redoubtable(awful, dreadful) | |
| relentless(appearance, hopeless) | |
| resolute(appearance, hopeless) | |
| shuddersome(nasty, awful, dreadful, disturbing) | |
| splenetic(appearance, hopeless) | |
| sublime(awful, dreadful) | |
| tremendous(awful, dreadful) | |
| truculent(adjective, appearance, unpleasant, horrible) | |
| unrelenting(appearance, hopeless) | |
| unspeakable(awful, dreadful) | |
| unyielding(appearance, hopeless) |
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| APA | Smart Define. (2016). sinister thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sinister/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sinister thesaurus" https://smartdefine.org/sinister/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, sinister thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sinister/thesaurus/synonyms>. |
| MLA | Smart Define. "sinister thesaurus" 3 April 2016. Web. 27 September 2026. <https://smartdefine.org/sinister/thesaurus/synonyms> |