67 entries under foundation topic. ×
| vital element(expression, essential, kingpin, fulcrum) | |
| warrant(noun, support, action, base, beginning) | |
| beginning(noun, base, source, root) | |
| key element(expression, essential, kingpin, fulcrum) | |
| main ingredient(expression, essential, kingpin, fulcrum) | |
| substructure | |
| supporting structure(expression, reinforcement) |
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| APA | Smart Define. (2015). keystone thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/keystone/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "keystone thesaurus" https://smartdefine.org/keystone/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, keystone thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/keystone/thesaurus/synonyms>. |
| MLA | Smart Define. "keystone thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/keystone/thesaurus/synonyms> |