67 entries under toughened topic. ×

2
obtuse(noun, adjective, hard, indifferent, unfeeling)
2
resistant(adjective, strong, hard, tough, fit)
2
unrepenting(adjective, hard, tough, harsh, cruel)
2
unsentimental(adjective, cynical, hard-boiled, hard-bitten)
1
benumbed(verb, adjective, hard, tough, severe)
1
blind to(expression, adjective, hard, careless, indifferent)
1
careless(adjective, hard, indifferent, cruel, apathetic)
1
cruel(adjective, hard, tough, severe, careless)
1
deaf to(expression, adjective, hard, careless, indifferent)
1
hard-as-nails(adjective, hard, tough, unfeeling, unsympathetic)
1
impenetrable(adjective, set, strong, hard, tough)
1
impious(adjective, hard, wicked, immoral, unfeeling)
1
insentient(adjective, hard, careless, indifferent, cruel)
1
irreverent(adjective, hard, wicked, immoral, unfeeling)
1
prepared(adjective, hard, wise, unfeeling, unsympathetic)
1
soulless(adjective, hard, careless, indifferent, cruel)
1
spiritless(adjective, hard, cool, careless, indifferent)
1
torpid(adjective, hard, careless, indifferent, cruel)
1
unaffected(adjective, hard, careless, indifferent, cruel)
1
unashamed(adjective, hard, rude, corrupt, bold)
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APASmart Define. (2016). hardened thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hardened/thesaurus/synonyms
ChicagoSmart Define. 2016. "hardened thesaurus" https://smartdefine.org/hardened/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, hardened thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hardened/thesaurus/synonyms>.
MLASmart Define. "hardened thesaurus" 29 March 2016. Web. 30 September 2026. <https://smartdefine.org/hardened/thesaurus/synonyms>