128 entries under hard topic. ×

1
inflexible(adjective, mean, careless, indifferent)
1
insusceptible(adjective, insensitive, unsusceptible)
1
iron(adjective, mean, tough, harsh)
1
iron-hearted(adjective, tough, severe, cruel)
1
mean(adjective, tough, harsh, unfeeling)
1
mulish(adjective, mean, harsh, inflexible)
1
obstinate(adjective, mean, harsh, inflexible)
1
perverse(adjective, mean, tough, harsh)
1
relentless(adjective, mean, tough, harsh)
1
rigid(adjective, mean, harsh, detached)
1
sensationless(adjective, tough, severe, cruel)
1
senseless(adjective, tough, severe, cruel)
1
set in stone(expression, adjective, idiom, mean)
1
severe(adjective, calm, tough, harsh)
1
spiritless(adjective, careless, indifferent, cruel)
1
stiff(adjective, careless, indifferent, cruel)
1
stiff-necked(adjective, mean, tough, harsh)
1
surly(adjective, tough, severe, cruel)
1
tactless(adjective, indifferent, unsympathetic, unkind)
1
torpid(adjective, careless, indifferent, cruel)
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APASmart Define. (2016). thick-skinned thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/thick-skinned/thesaurus/synonyms
ChicagoSmart Define. 2016. "thick-skinned thesaurus" https://smartdefine.org/thick-skinned/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, thick-skinned thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/thick-skinned/thesaurus/synonyms>.
MLASmart Define. "thick-skinned thesaurus" 28 March 2016. Web. 26 September 2026. <https://smartdefine.org/thick-skinned/thesaurus/synonyms>