108 entries under tough topic. ×

10
determined(adjective, firm, resolute, impulsive)
10
hard-nosed(adjective, mean, strong, hard)
10
opinionated(adjective, firm, determined, resolute)
10
resolute(adjective, determined, obstinate, stubborn)
9
self-willed(adjective, firm, difficult, determined)
9
unrelenting(adjective, mean, strong, hard)
8
contumacious(adjective, firm, determined, unreasonable)
8
recalcitrant(adjective, firm, difficult, awkward)
8
relentless(adjective, mean, strong, hard)
8
stiff-necked(adjective, mean, strong, hard)
7
adamantine(adjective, strong, hard, firm)
7
hard(adjective, mean, strong, determined)
7
inexorable(adjective, mean, strong, hard)
7
persistent(adjective, firm, determined, resolute)
7
unbending(adjective, mean, strong, hard)
6
balky(firm, unreasonable, grim, inflexible)
6
steadfast(adjective, firm, determined, resolute)
6
wayward(adjective, difficult, awkward, contrary)
5
unruly(difficult, determined, awkward, impulsive)
5
unshakable(adjective, mean, strong, hard)
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APASmart Define. (2015). mulish thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/mulish/thesaurus/synonyms
ChicagoSmart Define. 2015. "mulish thesaurus" https://smartdefine.org/mulish/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, mulish thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/mulish/thesaurus/synonyms>.
MLASmart Define. "mulish thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/mulish/thesaurus/synonyms>