140 entries under basis topic. ×
| principle(noun, support, action, feeling, plan) | |
| root(noun, support, action, cause, substance) | |
| apologia(noun, cause, approval, argument, explanation) | |
| impetus(noun, drive, cause, desire, interest) | |
| soul(noun, feeling, understanding, power, cause) | |
| spring(noun, cause, start, object, aim) | |
| why and wherefore(noun, expression, idiom, action, cause) | |
| answer(noun, verb, fix, consider, oppose) | |
| design(noun, form, end, feeling, understanding) | |
| determinant(noun, feature, cause, influence, issue) | |
| exposition(noun, action, cause, argument, explanation) | |
| source(noun, support, regulation, action, cause) | |
| substance(noun, good, feeling, understanding, cause) | |
| whyfor(noun, action, information, cause, plan) | |
| footing(noun, support, action, cause, start) | |
| origin(noun, regulation, cause, start, base) | |
| target(noun, cause, plan, desire, object) | |
| ulterior motive(noun, expression, cause, plan, desire) | |
| approval(noun, argument, explanation, excuse, reasoning) | |
| base(noun, support, regulation, action, cause) |
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| APA | Smart Define. (2016). reason thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/reason/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "reason thesaurus" https://smartdefine.org/reason/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, reason thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/reason/thesaurus/synonyms>. |
| MLA | Smart Define. "reason thesaurus" 25 February 2016. Web. 23 September 2026. <https://smartdefine.org/reason/thesaurus/synonyms> |