| tot's repeated query(expression, idiom) | |
| tough proposition | |
| trace(noun, information, reason, picture, evidence) | |
| troth | |
| truly | |
| twister(difficulty, question, secret, puzzle, knot) | |
| underlying reason | |
| validation(noun, information, reason, picture, evidence) | |
| verification(noun, information, reason, picture, evidence) | |
| vexed question | |
| view(noun, purpose, planned) | |
| vindication(noun, cause, idea, case, basis) | |
| warrant(noun, information, cause, reason, consideration) | |
| whence | |
| whereto | |
| who | |
| whodunit(difficulty, question, secret, puzzle, obscurity) | |
| whyever | |
| whys | |
| witness(noun, information, reason, picture, evidence) |
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| APA | Smart Define. (2016). why thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/why/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "why thesaurus" https://smartdefine.org/why/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, why thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/why/thesaurus/synonyms>. |
| MLA | Smart Define. "why thesaurus" 2 February 2016. Web. 23 September 2026. <https://smartdefine.org/why/thesaurus/synonyms> |