75 entries under firm topic. ×

20
headstrong(adjective, tough, resist, determined)
16
inflexible(adjective, mean, hard, deliberate)
16
intractable(adjective, tough, deliberate, determined)
16
perverse(adjective, mean, hard, tough)
16
willful(adjective, tough, difficult, resist)
14
bullheaded(adjective, tough, difficult, resist)
13
self-willed(adjective, tough, difficult, determined)
11
pertinacious(adjective, tough, difficult, resist)
10
opinionated(adjective, tough, determined, resolute)
9
hardheaded(adjective, tough, resist, determined)
9
refractory(adjective, tough, difficult, determined)
9
tenacious(adjective, tough, difficult, resist)
9
uncompromising(adjective, mean, hard, deliberate)
8
recalcitrant(adjective, tough, difficult, awkward)
7
determined(adjective, tough, deliberate, usual)
7
rigid(adjective, mean, hard, tough)
7
unrelenting(adjective, mean, hard, tough)
6
set(adjective, usual, sure, planned)
5
contumacious(adjective, tough, determined, unreasonable)
4
balky(tough, unreasonable, grim, inflexible)
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APASmart Define. (2015). pigheaded thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/pigheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "pigheaded thesaurus" https://smartdefine.org/pigheaded/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, pigheaded thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/pigheaded/thesaurus/synonyms>.
MLASmart Define. "pigheaded thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/pigheaded/thesaurus/synonyms>