- Definitions|1
- Thesaurus|406
- Abbreviations|0
| calming(excellent, gentle, marvelous, vague, dreamy) | |
| chimerical(excellent, gentle, marvelous, vague, dreamy) | |
| daydreaming(gentle, marvelous, vague, dreamy, faraway) | |
| demoniac(adjective, extraordinary, unreasonable, inappropriate, absurd) | |
| disquieting(adjective, frightening) | |
| distracted | |
| distrait | |
| eccentric | |
| eldritch | |
| ethereal(adjective, extraordinary, unreasonable, inappropriate, absurd) | |
| exasperating | |
| excellent(gentle, marvelous, vague, dreamy, faraway) | |
| exotic | |
| extravagant | |
| extremely alarming(expression, idiom) | |
| faraway | |
| fiendish | |
| formidable | |
| freakish | |
| frustrating |
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| APA | Smart Define. (2013). nightmarish thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/nightmarish/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "nightmarish thesaurus" https://smartdefine.org/nightmarish/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2013, nightmarish thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/nightmarish/thesaurus/synonyms>. |
| MLA | Smart Define. "nightmarish thesaurus" 28 June 2013. Web. 29 September 2026. <https://smartdefine.org/nightmarish/thesaurus/synonyms> |