108 entries under stubborn topic. ×

2
unalterable(adjective, close, set, hard, severe)
2
unmanageable(tough, firm, persistent, obstinate)
2
willful(adjective, tough, firm, determined, resolute)
1
balky(tough, firm, unreasonable, grim, inflexible)
1
bullhead(adjective, mean, hard, tough, harsh)
1
cold fish(expression, adjective, mean, hard)
1
dyed-in-the-wool(adjective, set, strong, hard, tough)
1
fast(adjective, strong, tough, firm, intense)
1
hard-boiled(adjective, mean, strong, hard, tough)
1
ornery(tough, firm, unreasonable, grim, inflexible)
1
rebellious(tough, firm, unreasonable, grim, inflexible)
1
strong(adjective, hard, tough, severe, firm)
1
sturdy(adjective, strong, hard, tough, firm)
1
thick-skinned(adjective, mean, hard, tough, harsh)
1
tough nut to crack(expression, adjective, idiom, mean, hard)
1
unchanging(adjective, close, severe, firm, harsh)
1
unimpressible(adjective, mean, hard, tough, harsh)
1
unreasonable(tough, firm, grim, inflexible, obstinate)
1
untoward(tough, firm, unreasonable, grim, inflexible)
0
contradictory(determined, fixed)
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APASmart Define. (2015). relentless thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/relentless/thesaurus/synonyms
ChicagoSmart Define. 2015. "relentless thesaurus" https://smartdefine.org/relentless/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, relentless thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/relentless/thesaurus/synonyms>.
MLASmart Define. "relentless thesaurus" 24 June 2015. Web. 29 September 2026. <https://smartdefine.org/relentless/thesaurus/synonyms>