1
positive(set, certain, unquestionable, indisputable, unassailable)
1
powerful(adjective, severe, harsh, stiff, rigid)
1
prearranged(adjective, firm, determined, usual, regular)
1
predetermined(adjective, firm, determined, usual, regular)
1
prescribed(adjective, firm, determined, usual, regular)
1
procrustean
1
proven(set, certain, unquestionable, indisputable, unassailable)
1
purist
1
puristic
1
puritan
1
puritanic
1
puritanical
1
ram(noun, combatant)
1
regular(adjective, firm, determined, usual, planned)
1
remorseless
1
resolute(adjective, set, hard, firm, determined)
1
resolved(adjective, firm, determined, usual, regular)
1
rigorist
1
rigoristic
1
rockbound
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APASmart Define. (2015). ironclad thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/ironclad/thesaurus/synonyms
ChicagoSmart Define. 2015. "ironclad thesaurus" https://smartdefine.org/ironclad/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, ironclad thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/ironclad/thesaurus/synonyms>.
MLASmart Define. "ironclad thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/ironclad/thesaurus/synonyms>