Synonyms|1.1kAntonyms|182|Broader|18Narrower|25Related|905

63 entries under base topic. ×

3
keystone(noun, law, support, regulation, action)
2
cause(noun, support, regulation, action, start)
2
crux(noun, support, action, cause, start)
2
footing(noun, support, action, cause, start)
2
ground(noun, law, regulation, cause, start)
2
nub(noun, adjective, cause, start)
2
nucleus(noun, support, action, cause, start)
2
seat(cause, quick, source, basis)
2
substratum(noun, support, action, cause, start)
2
underpinning(noun, support, action, cause, start)
1
action(noun, law, support, rule)
1
antecedent(noun, adjective, support, action)
1
authority(noun, support, action, beginning)
1
backbone(noun, support, action, beginning)
1
background(noun, support, action, beginning)
1
backing(noun, support, action, beginning)
1
chief ingredient(noun, expression, support, action)
1
evidence(noun, support, action, beginning)
1
explanation(noun, support, action, beginning)
1
hard fact(noun, expression, support, action)
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ChicagoSmart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, fundamental thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>.
MLASmart Define. "fundamental thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms>