108 entries under stubborn topic. ×

7
mulish(adjective, mean, strong, hard, tough)
7
single-minded(adjective, tough, firm, intense, cruel)
7
steely(adjective, strong, hard, tough, cold)
7
stringent(adjective, set, hard, severe, sharp)
7
uncompliant(adjective, tough, firm, resist, determined)
6
hard-hearted(adjective, mean, hard, tough, evil)
6
incompliant(adjective, resist, determined, resolute, persistent)
6
intractable(adjective, appearance, strong, tough, firm)
6
unswerving(adjective, strong, tough, firm, intense)
6
unsympathetic(adjective, animal, mean, hard, severe)
5
bound(adjective, strong, tough, firm, cruel)
5
faithful(adjective, strong, firm, intense, determined)
5
headstrong(adjective, strong, tough, cold, determined)
5
loyal(adjective, strong, firm, intense, determined)
5
unfaltering(adjective, strong, firm, energetic, vigorous)
4
hardened(adjective, hard, tough, harsh, cold)
4
pigheaded(adjective, mean, hard, tough, determined)
4
staunch(adjective, strong, tough, firm, determined)
4
unmoved(adjective, cold, cruel, determined, fixed)
3
serious(adjective, close, strong, hard, tough)
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APASmart Define. (2015). relentless thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/relentless/thesaurus/synonyms
ChicagoSmart Define. 2015. "relentless thesaurus" https://smartdefine.org/relentless/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, relentless thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/relentless/thesaurus/synonyms>.
MLASmart Define. "relentless thesaurus" 24 June 2015. Web. 28 September 2026. <https://smartdefine.org/relentless/thesaurus/synonyms>