2
unchangeable(adjective, obstinate, stubborn, unbending)
2
uncompliant(adjective, tough, firm, determined, unreasonable)
2
uncontrollable(adjective, impulsive, reckless, impetuous)
2
unmanageable(adjective, tough, firm, difficult, awkward)
2
unpliable(tough, difficult, awkward, obstinate, stubborn)
2
unregenerate
2
wrong-headed(adjective, determined, fixed, obstinate, stubborn)
1
agreed(adjective, firm, determined, usual, regular)
1
appointed(adjective, firm, determined, usual, regular)
1
arranged(adjective, firm, determined, usual, regular)
1
asinine
1
astute(adjective, hard, tough, sharp, practical)
1
balking
1
bent(adjective, firm, determined, usual, regular)
1
bigoted
1
blockish
1
bulldogged
1
bulletheaded
1
bullhead(adjective, mean, hard, harsh, inflexible)
1
cantankerous(tough, firm, difficult, awkward, unreasonable)
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APASmart Define. (2015). pigheaded thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/pigheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "pigheaded thesaurus" https://smartdefine.org/pigheaded/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, pigheaded thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/pigheaded/thesaurus/synonyms>.
MLASmart Define. "pigheaded thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/pigheaded/thesaurus/synonyms>