- Definitions|1
- Thesaurus|406
- Abbreviations|0
152 entries under adjective topic. ×
| exotic | |
| extravagant | |
| fiendish | |
| freakish | |
| frustrating | |
| funereal(extraordinary, unreasonable, inappropriate, absurd) | |
| heavenly(extraordinary, unreasonable, inappropriate, ridiculous) | |
| hyperphysical(extraordinary, unreasonable, inappropriate, absurd) | |
| inhuman | |
| merciless | |
| nauseous | |
| not of this world(expression, idiom, unreasonable, absurd) | |
| odd | |
| peculiar | |
| phantom(extraordinary, unreasonable, inappropriate, absurd) | |
| preternatural(extraordinary, unreasonable, inappropriate, absurd) | |
| quaint | |
| queer | |
| remarkable | |
| repellent |
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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> |