| hypothesis(theory, guesstimate, premise) | |
| income(noun, essence, core, outcome, upshot) | |
| indispensable content(noun, expression, essence, core, outcome) | |
| ineluctable | |
| inescapable | |
| intrinsic truth(expression, theory, guesstimate, premise) | |
| key | |
| key point(noun, expression, essence, core, outcome) | |
| keynote | |
| kingpin | |
| last word(noun, expression, essence, core, outcome) | |
| lemma(theory, guesstimate, premise) | |
| limit(condition, requirement, proviso) | |
| limitation(condition, requirement, prerequisite) | |
| loss(noun, essence, core, outcome, upshot) | |
| main idea(noun, expression, heart, essential, essence) | |
| meat and potatoes(noun, expression, idiom, condition, essence) | |
| modus operandi(expression, stipulation, tenet, axiom) | |
| must-have | |
| name of game(noun, expression, idiom, heart, essential) |
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Sine_qua_non on
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| APA | Smart Define. (2015). sine qua non thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/sine_qua_non/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sine qua non thesaurus" https://smartdefine.org/sine_qua_non/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, sine qua non thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/sine_qua_non/thesaurus/synonyms>. |
| MLA | Smart Define. "sine qua non thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/sine_qua_non/thesaurus/synonyms> |