- Definitions|2
- Thesaurus|326
- Abbreviations|0
| indescribable(adjective, awful, foul, disgusting, vague) | |
| unutterable(adjective, awful, foul, disgusting, unspeakable) | |
| ineffable(adjective, unspeakable) | |
| inexpressible(adjective, awful, foul, disgusting, unspeakable) | |
| unspeakable(adjective, bad) | |
| undefinable | |
| untellable | |
| vague(adjective, subtle, elusive) | |
| incommunicable(adjective, awful, foul, disgusting, unspeakable) | |
| undefined | |
| undescribable(adjective, unspeakable) | |
| elusive(adjective, mysterious, evasive) | |
| indefinite | |
| indeterminate | |
| awful(adjective, unspeakable) | |
| amorphous | |
| beyond words(expression, adjective, awful, foul, disgusting) | |
| defying description(expression, adjective, idiom, unspeakable, undescribable) | |
| hazy | |
| indistinct |
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| APA | Smart Define. (2015). indefinable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/indefinable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indefinable thesaurus" https://smartdefine.org/indefinable/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, indefinable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/indefinable/thesaurus/synonyms>. |
| MLA | Smart Define. "indefinable thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/indefinable/thesaurus/synonyms> |