- Definitions|1
- Thesaurus|295
- Abbreviations|0
| inarticulate | |
| incredible | |
| marvellous | |
| marvelous | |
| metaphysical | |
| mind-boggling | |
| mysterial(adjective, difficult, ambiguous, hidden, unfathomable) | |
| mysterious blank(expression, difficult, ambiguous, hidden, unfathomable) | |
| other-worldly | |
| paranormal | |
| phenomenal | |
| poker-faced(adjective, difficult, ambiguous, hidden, unfathomable) | |
| preterhuman | |
| psychic | |
| recondite | |
| secret(adjective, hidden, unfathomable, incomprehensible, enigmatic) | |
| spectacular | |
| spectral | |
| sphinx-like(unfathomable, enigmatic) | |
| sphinxlike(adjective, difficult, ambiguous, hidden, unfathomable) |
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| APA | Smart Define. (2015). unexplainable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unexplainable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unexplainable thesaurus" https://smartdefine.org/unexplainable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, unexplainable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unexplainable/thesaurus/synonyms>. |
| MLA | Smart Define. "unexplainable thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/unexplainable/thesaurus/synonyms> |