50 entries under prerequisite topic. ×

12
requirement(noun, condition, need, essential, certainty)
11
necessity(noun, condition, need, essential, essence)
11
requisite(noun, condition, need, essential, certainty)
9
must(noun, condition, need, essential, certainty)
8
condition(noun, essential, essence, basic, theory)
8
fundamental(noun, part, need, essential, certainty)
8
precondition(noun, condition, need, essential, certainty)
7
provision(noun, condition, essential, requirement, qualification)
7
stipulation(noun, condition, essential, requirement, qualification)
6
proviso(noun, condition, essential, requirement, qualification)
3
desideratum(noun, need, essential, requirement)
3
necessary(noun, need, essential, obligation, requirement)
3
obligation(noun, condition, need, essential, requirement)
2
arrangement(noun, condition, essential, requirement, qualification)
2
basic(noun, law, condition, heart, essential)
2
contingency(noun, condition, essential, requirement, qualification)
2
essence(noun, condition, need, essential, certainty)
2
exception(noun, condition, essential, requirement, qualification)
2
exemption(noun, condition, essential, requirement, qualification)
2
modification(noun, condition, essential, requirement, qualification)
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APASmart Define. (2015). sine qua non thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/sine_qua_non/thesaurus/synonyms
ChicagoSmart Define. 2015. "sine qua non thesaurus" https://smartdefine.org/sine_qua_non/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, sine qua non thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/sine_qua_non/thesaurus/synonyms>.
MLASmart Define. "sine qua non thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/sine_qua_non/thesaurus/synonyms>