- Definitions|1
- Thesaurus|406
- Abbreviations|0
152 entries under adjective topic. ×
| grim | |
| mythical(excellent, gentle, marvelous, vague) | |
| ominous | |
| shadowy(excellent, gentle, marvelous, vague) | |
| spectral | |
| apparitional | |
| bizarre | |
| demonic | |
| direful | |
| dismaying | |
| fanciful(excellent, gentle, marvelous, vague) | |
| fantastic(excellent, gentle, marvelous, vague) | |
| fearsome | |
| grotesque | |
| hellish | |
| moony(gentle, marvelous, dreamy) | |
| morbid | |
| outlandish | |
| petrifying | |
| strange |
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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> |