- Definitions|1
- Thesaurus|406
- Abbreviations|0
152 entries under adjective topic. ×
| terrific | |
| traumatic(terrible, frightening, nightmare, terrifying) | |
| ugly | |
| unearthly | |
| unnerving | |
| weird | |
| Kafkaesque | |
| abnormal(extraordinary, unreasonable, inappropriate, absurd) | |
| absurd(extraordinary, unreasonable, inappropriate, ridiculous) | |
| alien | |
| barbaric | |
| barbarous | |
| beastly | |
| brutal | |
| brutish | |
| demoniac(extraordinary, unreasonable, inappropriate, absurd) | |
| disquieting | |
| eccentric | |
| ethereal(extraordinary, unreasonable, inappropriate, absurd) | |
| exasperating |
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| APA | Smart Define. (2013). nightmarish thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/nightmarish/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "nightmarish thesaurus" https://smartdefine.org/nightmarish/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2013, nightmarish thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/nightmarish/thesaurus/synonyms>. |
| MLA | Smart Define. "nightmarish thesaurus" 28 June 2013. Web. 30 September 2026. <https://smartdefine.org/nightmarish/thesaurus/synonyms> |