| sunless | |
| to come(expression, adjective, likely, possible, immediate) | |
| unfriendly(tough, offensive, dark, negative, hostile) | |
| acute(adjective, dangerous) | |
| agitating(verb, hard, severe, offensive, distressing) | |
| alerting(verb, adjective, warning) | |
| antagonistic(adjective, violent, negative, hostile, aggressive) | |
| apocalyptic(adjective, warning, menacing, intimidating, ominous) | |
| arduous | |
| backbreaking | |
| belligerent | |
| cautionary(adjective, warning) | |
| cautioning(verb, warning, cautionary) | |
| chancy(adjective, bad, delicate, heavy, uncertain) | |
| clayey | |
| cloggy | |
| cold(violent, wild, bitter, murky, windy) | |
| condemned(near, doomed, coming, intended, designed) | |
| contentious | |
| corrupt(adjective, evil, nasty, mysterious, disturbing) |
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| APA | Smart Define. (2016). threatening thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/threatening/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "threatening thesaurus" https://smartdefine.org/threatening/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, threatening thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/threatening/thesaurus/synonyms>. |
| MLA | Smart Define. "threatening thesaurus" 23 March 2016. Web. 21 September 2026. <https://smartdefine.org/threatening/thesaurus/synonyms> |