13 entries under rigor topic. ×

2
grimness(noun, state, quality, resist, perseverance)
2
obdurateness(noun, state, quality, resist, perseverance)
2
obstinacy(noun, perseverance, stubbornness, inflexibility)
2
pertinacity(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
adamancy(perseverance, obstinacy, stubbornness, inflexibility)
1
bullheadedness(perseverance, obstinacy, stubbornness, inflexibility)
1
contumacy(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
doggedness(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
indomitability(perseverance, obstinacy, stubbornness, inflexibility)
1
mulishness(perseverance, obstinacy, stubbornness, inflexibility)
1
pigheadedness(noun, perseverance, obstinacy, stubbornness, inflexibility)
1
remorselessness(noun, state, quality, resist, perseverance)
0
dogmatism(obstinacy, stubbornness)
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APASmart Define. (2013). inflexibleness thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/inflexibleness/thesaurus/synonyms
ChicagoSmart Define. 2013. "inflexibleness thesaurus" https://smartdefine.org/inflexibleness/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2013, inflexibleness thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/inflexibleness/thesaurus/synonyms>.
MLASmart Define. "inflexibleness thesaurus" 28 June 2013. Web. 29 September 2026. <https://smartdefine.org/inflexibleness/thesaurus/synonyms>