497 entries under adjective topic. ×

5
recalcitrant(tough, firm, difficult, violent)
5
rocky(difficult, troubled, inflexible, unyielding)
5
single-minded(tough, firm, harsh, cruel)
5
stonyhearted
5
stringent(tough, severe, harsh, cruel)
5
unchangeable(strong, hard, definite, inflexible)
5
unresponsive(person, mean, hard, cool)
5
unsparing(close, strong, hard, tough)
4
brutal(mean, hard, tough, severe)
4
cold-hearted(hard, tough, severe, attitude)
4
coldhearted(hard, cold, indifferent, detached)
4
demanding
4
frigid(mean, hard, cool, harsh)
4
icy(mean, hard, cool, tough)
4
incorrigible
4
insensate(hard, tough, severe, careless)
4
mean(hard, cool, harsh, unpleasant)
4
narrow(hateful, impatient, prejudiced, fanatical)
4
rocklike
4
stony-hearted(cold, cruel, unfeeling, unsympathetic)
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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>