21 entries under firm topic. ×

8
adamantine(adjective, tough, resist, determined)
7
implacable(adjective, tough, resist, determined)
7
intractable(adjective, tough, unreasonable, irritable)
7
relentless(adjective, tough, resist, determined)
6
adamant(adjective, tough, resist, determined)
6
recalcitrant(adjective, tough, unreasonable, grim)
6
refractory(adjective, tough, stubborn, unruly)
5
determined(adjective, tough, resolute, stubborn)
5
rebellious(adjective, tough, unreasonable, grim)
4
immovable(adjective, hard, determined, resolute)
4
steadfast(adjective, determined, unreasonable, grim)
3
fixed(adjective, set, tough, unreasonable)
3
perverse(adjective, tough, unreasonable, grim)
3
resolute(adjective, hard, determined, rigid)
3
single-minded(adjective, tough, unreasonable, grim)
2
ornery(adjective, tough, informal, unreasonable)
2
pigheaded(adjective, tough, determined, unreasonable)
2
unmanageable(adjective, tough, unreasonable, stubborn)
1
dogged(adjective, tough, unreasonable, grim)
1
hard(adjective, resolute, rigid, inflexible)
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APASmart Define. (2015). uncompliant thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/uncompliant/thesaurus/synonyms
ChicagoSmart Define. 2015. "uncompliant thesaurus" https://smartdefine.org/uncompliant/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, uncompliant thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/uncompliant/thesaurus/synonyms>.
MLASmart Define. "uncompliant thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/uncompliant/thesaurus/synonyms>