200 entries under hard topic. ×

1
dyed-in-the-wool(adjective, strong, tough, severe)
1
fixed(adjective, mean, rough, harsh)
1
flinty(adjective, strong, tough, severe)
1
forbidding(adjective, person, strong, tough)
1
frowning(adjective, strong, tough, severe)
1
grim(adjective, strong, tough, severe)
1
habituated(adjective, unfeeling, unsympathetic, hardened)
1
hang-tough(adjective, strong, tough, severe)
1
hanging tough(expression, adjective, mean, stubborn)
1
hard-as-nails(adjective, unfeeling, unsympathetic, hardened)
1
hard-core(adjective, strong, tough, severe)
1
hard-shell(adjective, strong, tough, severe)
1
hard as nails(expression, adjective, idiom, tough)
1
immovable(adjective, mean, strong, tough)
1
impassive(adjective, calm, tough, careless)
1
impenetrable(adjective, unfeeling, unsympathetic, hardened)
1
impenitent(adjective, careless, indifferent, cruel)
1
impious(adjective, unfeeling, unsympathetic, hardened)
1
inaccessible(adjective, unfeeling, unsympathetic, hardened)
1
incurious(adjective, indifferent, detached, distant)
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APASmart Define. (2016). hard-boiled thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard-boiled/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-boiled thesaurus" https://smartdefine.org/hard-boiled/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, hard-boiled thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard-boiled/thesaurus/synonyms>.
MLASmart Define. "hard-boiled thesaurus" 23 March 2016. Web. 28 September 2026. <https://smartdefine.org/hard-boiled/thesaurus/synonyms>