82 entries under hardened topic. ×

6
hard-nosed(adjective, mean, strong, hard, tough)
6
insensible(adjective, bad, strong, hard, tough)
6
ruthless(adjective, hard, severe, sharp, rough)
6
unresponsive(adjective, calm, person, bad, hard)
5
dispassionate(adjective, calm, sensible, cold, cruel)
5
hard-bitten(adjective, hard, tough, rough, harsh)
5
inhuman(adjective, bad, hard, cold, cruel)
5
merciless(adjective, person, hard, severe, rough)
5
unconcerned(adjective, calm, hard, careless, indifferent)
4
insensate(noun, adjective, bad, hard, careless)
4
inured(noun, adjective, hard, careless, indifferent)
4
unbending(adjective, mean, strong, hard, tough)
4
uncaring(adjective, bad, hard, careless, cold)
3
insentient(adjective, bad, hard, careless, cold)
3
matter-of-fact(adjective, hard, sound, reasonable, sensible)
3
pitiless(adjective, hard, severe, sharp, nasty)
2
brutal(adjective, hard, tough, severe, sharp)
2
savage(adjective, hard, severe, rough, harsh)
2
soulless(adjective, hard, careless, indifferent, cruel)
2
steely(adjective, strong, hard, tough, severe)
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APASmart Define. (2016). hard-boiled thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hard-boiled/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-boiled thesaurus" https://smartdefine.org/hard-boiled/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, hard-boiled thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hard-boiled/thesaurus/synonyms>.
MLASmart Define. "hard-boiled thesaurus" 23 March 2016. Web. 29 September 2026. <https://smartdefine.org/hard-boiled/thesaurus/synonyms>