- Definitions|1
- Thesaurus|406
- Abbreviations|0
32 entries under frightening topic. ×
| dreadful(adjective, nasty, awful, terrible, disturbing) | |
| horrible(adjective, endured) | |
| terrible(adjective, endured, nightmare, traumatic) | |
| ghastly(adjective, terrible, unreasonable, absurd, heavenly) | |
| awful(adjective, endured) | |
| creepy(adjective, nasty, scary) | |
| grisly(adjective, endured) | |
| macabre(adjective, endured) | |
| horrendous(adjective, terrible, endured, nightmare) | |
| horrid(adjective, endured) | |
| horrifying(adjective, endured) | |
| terrifying(adjective, nasty, awful, terrible, weird) | |
| dire(adjective, endured) | |
| alarming | |
| hair-raising(adjective, nasty, awful, terrible, unreasonable) | |
| ghoulish(adjective, nasty, awful, terrible, unreasonable) | |
| scary(adjective, nasty, awful, terrible, unreasonable) | |
| spooky | |
| fearful | |
| nightmare(adjective, terrible, traumatic, terrifying) |
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| APA | Smart Define. (2013). nightmarish thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/nightmarish/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "nightmarish thesaurus" https://smartdefine.org/nightmarish/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2013, nightmarish thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/nightmarish/thesaurus/synonyms>. |
| MLA | Smart Define. "nightmarish thesaurus" 28 June 2013. Web. 1 October 2026. <https://smartdefine.org/nightmarish/thesaurus/synonyms> |