11 entries under tough topic. ×

2
headstrong(adjective, firm, unreasonable, grim)
2
mulish(adjective, firm, determined, unreasonable)
1
bullheaded(adjective, firm, determined, unreasonable)
1
determined(adjective, firm, impulsive, stubborn)
1
intractable(adjective, firm, determined, unreasonable)
1
perverse(adjective, firm, determined, unreasonable)
1
pigheaded(adjective, firm, unreasonable, grim)
1
refractory(adjective, firm, determined, unreasonable)
1
self-willed(adjective, firm, determined, unreasonable)
1
unyielding(adjective, firm, determined, impulsive)
1
willful(adjective, firm, determined, unreasonable)
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APASmart Define. (2015). mule thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/mule/thesaurus/synonyms
ChicagoSmart Define. 2015. "mule thesaurus" https://smartdefine.org/mule/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, mule thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/mule/thesaurus/synonyms>.
MLASmart Define. "mule thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/mule/thesaurus/synonyms>