497 entries under adjective topic. ×

15
unfeeling(mean, hard, cool, tough)
14
headstrong(hard, tough, rough, harsh)
14
stiff-necked(strong, hard, tough, severe)
13
hard-boiled(person, strong, hard, tough)
13
hard-hearted(mean, hard, tough, severe)
13
harsh(mean, strong, hard, cool)
13
iron(strong, hard, tough, firm)
13
pertinacious(determined, resolute, obstinate, stubborn)
13
pigheaded(tough, determined, resolute, obstinate)
13
remorseless(mean, tough, harsh, resist)
13
unsympathetic(mean, hard, cool, tough)
12
heartless(mean, feeling, hard, cool)
12
steely(strong, hard, tough, cold)
12
uncompliant(resist, determined, resolute, obstinate)
11
contrary(difficult, determined, resolute, obstinate)
11
flinty(close, strong, hard, tough)
11
opinionated(tough, firm, determined, resolute)
11
persistent(strong, tough, flat, firm)
11
strong-willed(determined, resolute, uncompromising, unshakeable)
10
incompliant(resist, determined, resolute, obstinate)
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APASmart Define. (2016). obdurate thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/obdurate/thesaurus/synonyms
ChicagoSmart Define. 2016. "obdurate thesaurus" https://smartdefine.org/obdurate/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, obdurate thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/obdurate/thesaurus/synonyms>.
MLASmart Define. "obdurate thesaurus" 23 March 2016. Web. 26 September 2026. <https://smartdefine.org/obdurate/thesaurus/synonyms>