68 entries under fundamental topic. ×
| backing(noun, support, action, base, beginning) | |
| bedrock(noun, support, action, cause, start) | |
| center(noun, support, action, person, cause) | |
| chief ingredient(noun, expression, support, action, base) | |
| criterion(noun, law, regulation, rule, idea) | |
| crux(noun, support, action, cause, start) | |
| essence(noun, support, action, cause, start) | |
| essential(noun, support, action, base, beginning) | |
| explanation(noun, support, action, reason, base) | |
| footing(noun, support, action, cause, start) | |
| formula(noun, law, regulation, rule, standard) | |
| hard fact(noun, expression, support, action, base) | |
| heart(noun, support, action, cause, start) | |
| infrastructure(noun, support, action, cause, start) | |
| justification(noun, support, action, base, beginning) | |
| keynote(noun, support, action, idea, base) | |
| keystone(noun, support, action, idea, base) | |
| law(noun, support, action, rule, base) | |
| maxim(noun, law, regulation, rule, standard) | |
| nexus(noun, support, action, base, beginning) |
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| APA | Smart Define. (2015). source thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/source/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "source thesaurus" https://smartdefine.org/source/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, source thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/source/thesaurus/synonyms>. |
| MLA | Smart Define. "source thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/source/thesaurus/synonyms> |