- Definitions|2
- Thesaurus|885
- Abbreviations|0
| hazardous | |
| hinting(verb, adjective, threatening) | |
| nauseating(adjective, awful, terrible, grim, shocking) | |
| nerve-racking | |
| nerve-wracking | |
| nightmarish(adjective, nasty, awful, terrible, unreasonable) | |
| pessimistic(hard, severe, offensive, distressing, upsetting) | |
| redoubtable | |
| revolting | |
| risky | |
| severe(adjective, hard, offensive, dark, violent) | |
| terrorizing(noun, verb, adjective, mean, sharp) | |
| tormenting(verb, adjective, threatening) | |
| touchy | |
| uncanny(adjective, awful, terrible, unreasonable, shocking) | |
| uncertain(hard, severe, offensive, distressing, upsetting) | |
| unnatural(awful, terrible, grim, shocking, upsetting) | |
| warning(verb, adjective, threatening) | |
| worrisome(adjective, hard, severe, offensive, distressing) | |
| abject |
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| APA | Smart Define. (2016). frightening thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/frightening/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "frightening thesaurus" https://smartdefine.org/frightening/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, frightening thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/frightening/thesaurus/synonyms>. |
| MLA | Smart Define. "frightening thesaurus" 23 March 2016. Web. 27 September 2026. <https://smartdefine.org/frightening/thesaurus/synonyms> |