- Definitions|2
- Thesaurus|796
- Abbreviations|0
| portentous(adjective, fear, exciting, foreboding) | |
| sinister(adjective, hard, severe, offensive, distressing) | |
| terrific | |
| worrying(adjective, hard, severe, offensive, upsetting) | |
| bad(adjective, nasty, delicate, awful, heavy) | |
| baleful(adjective, arouse bad emotions) | |
| bloodcurdling(adjective, horrible, frightening, horrifying, terrifying) | |
| distressing(adjective, hard, severe, offensive, unpleasant) | |
| explosive(adjective, untrustworthy, insecure, risky, danger) | |
| forbidding(adjective, arouse bad emotions) | |
| gruesome | |
| hideous(adjective, awful) | |
| macabre | |
| perilous(adjective, bad, heavy, fear, insecure) | |
| ugly | |
| agitating(verb, hard, severe, offensive, distressing) | |
| brutal(adjective, arouse bad emotions) | |
| damaging(adjective, dangerous, arouse bad emotions) | |
| destructive(adjective, dangerous, arouse bad emotions) | |
| evil(adjective, arouse bad emotions) |
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| APA | Smart Define. (2016). alarming thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/alarming/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "alarming thesaurus" https://smartdefine.org/alarming/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, alarming thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/alarming/thesaurus/synonyms>. |
| MLA | Smart Define. "alarming thesaurus" 3 April 2016. Web. 20 September 2026. <https://smartdefine.org/alarming/thesaurus/synonyms> |