79 entries under determined topic. ×

10
self-willed(adjective, tough, firm, difficult)
9
willful(adjective, tough, firm, difficult, violent)
8
pertinacious(adjective, strong, tough, firm, difficult)
6
froward(adjective, negative, hostile, persistent)
6
persistent(adjective, tough, firm, obstinate)
6
relentless(adjective, appearance, strong, tough, firm)
6
restive(adjective, negative, hostile, fixed)
5
fixed(adjective, hard, tough, rough, firm)
4
resolved(adjective, fixed, persistent, obstinate)
4
steadfast(adjective, fixed, grim, persistent)
4
unalterable(adjective, hard, fixed, inflexible)
4
unflinching(adjective, cruel, fixed, resolute)
3
bullheaded(adjective, tough, firm, indifferent, deliberate)
3
opinionated(adjective, mean, tough, firm, violent)
2
dogmatic(adjective, fixed, rigid, inflexible)
2
hard-shell(adjective, persistent, impulsive, obstinate)
2
hardened(adjective, fixed, persistent, stubborn)
2
pig-headed(adjective, difficult, impulsive, obstinate)
2
unmoved(adjective, fixed, stubborn)
1
contradictory(negative, hostile, fixed, different)
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APASmart Define. (2015). intractable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/intractable/thesaurus/synonyms
ChicagoSmart Define. 2015. "intractable thesaurus" https://smartdefine.org/intractable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, intractable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/intractable/thesaurus/synonyms>.
MLASmart Define. "intractable thesaurus" 24 June 2015. Web. 23 September 2026. <https://smartdefine.org/intractable/thesaurus/synonyms>