423 entries under adjective topic. ×

2
obtuse(noun, hard, indifferent, unfeeling)
2
passionless(cool, blank, aloof, unemotional)
2
passive
2
pat(determined, resolute, uncompromising, unshakeable)
2
pertinacious(determined, fixed, resolute, stubborn)
2
perverse(determined, fixed, resolute, stubborn)
2
pigheaded(determined, fixed, resolute, stubborn)
2
pugnacious
2
reprobate(rude, corrupt, wicked, immoral)
2
resistant(strong, hard, tough, fit)
2
rocklike(firm, stiff, rigid)
2
rough(person, hard, fit, feelings)
2
rugged(strong, fit, healthy, well)
2
sclerotic
2
self-opinionated(determined, resolute, uncompromising, unshakeable)
2
self-willed(determined, fixed, resolute, stubborn)
2
severe(hard, tough, cruel, unsympathetic)
2
stale
2
stiff-necked(determined, resolute, uncompromising, unshakeable)
2
unmerciful(hard, tough, harsh, cruel)
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APASmart Define. (2016). hardened thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hardened/thesaurus/synonyms
ChicagoSmart Define. 2016. "hardened thesaurus" https://smartdefine.org/hardened/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, hardened thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hardened/thesaurus/synonyms>.
MLASmart Define. "hardened thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/hardened/thesaurus/synonyms>