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10 entries under rigor topic. ×

1
adamancy(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
bullheadedness(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
contumacy(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
doggedness(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
indomitability(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
mulishness(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
obstinacy(noun, perseverance, stubbornness, inflexibility)
1
pertinacity(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
pigheadedness(noun, perseverance, obstinacy, stubbornness, inflexibility)
0
dogmatism(obstinacy, stubbornness)
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APASmart Define. (2015). implacableness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/implacableness/thesaurus/synonyms
ChicagoSmart Define. 2015. "implacableness thesaurus" https://smartdefine.org/implacableness/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, implacableness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/implacableness/thesaurus/synonyms>.
MLASmart Define. "implacableness thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/implacableness/thesaurus/synonyms>