50 entries under firm topic. ×

1
mule(tough, determined, unreasonable, grim)
1
ornery(tough, unreasonable, grim, inflexible)
1
serious(adjective, strong, hard, tough, severe)
1
strong(adjective, hard, tough, determined)
1
sturdy(adjective, strong, hard, tough)
1
unmanageable(tough, difficult, awkward, unreasonable)
1
unreasonable(tough, grim, inflexible, obstinate)
1
untoward(tough, unreasonable, grim, inflexible)
0
deliberate(determined, resolute, decisive, intentional)
0
purposeful(deliberate, determined, resolute, obstinate)
<123>
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APASmart Define. (2015). mulish thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/mulish/thesaurus/synonyms
ChicagoSmart Define. 2015. "mulish thesaurus" https://smartdefine.org/mulish/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, mulish thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/mulish/thesaurus/synonyms>.
MLASmart Define. "mulish thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/mulish/thesaurus/synonyms>