52 entries under source topic. ×
| proof(noun, support, action, base, beginning) | |
| reason(noun, support, action, base, beginning) | |
| rudiment(noun, support, action, base, beginning) | |
| sanction(noun, support, action, base, beginning) | |
| security(noun, support, action, base, beginning) | |
| starting point(noun, expression, base, beginning) | |
| substratum(noun, support, action, base, beginning) | |
| theorem(noun, support, action, base, beginning) | |
| theory(noun, support, action, base, beginning) | |
| underpinning(noun, support, action, base, beginning) | |
| warrant(noun, support, action, base, beginning) | |
| beginning(noun, base, foundation, root) |
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| APA | Smart Define. (2015). keystone thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/keystone/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "keystone thesaurus" https://smartdefine.org/keystone/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, keystone thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/keystone/thesaurus/synonyms>. |
| MLA | Smart Define. "keystone thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/keystone/thesaurus/synonyms> |