Synonyms|531Antonyms|137|Broader|0Narrower|0Related|146

475 entries under adjective topic. ×

1
hard(reasonable, sensible, sober, stiff)
1
hard-as-nails(determined, serious, resolute, persistent)
1
hard-hearted(indifferent, detached, stiff, distant)
1
hard as nails(expression, idiom, tough, serious)
1
hardheaded(reasonable, firm, sensible, sober)
1
harsh(grim, painful, bleak)
1
inhuman(brutal, barbarous)
1
intent(serious, resolute, persistent, unwavering)
1
intractable(shrewd, astute, self-willed)
1
laid back(expression, indifferent, detached, distant)
1
mean business(expression, serious, resolute, persistent)
1
merciless(brutal, barbarous)
1
obdurate(tough, stiff, unfeeling, dogged)
1
obstinate(tough, serious, resolute, persistent)
1
on ice(expression, serious, resolute, persistent)
1
pat(serious, resolute, persistent, unwavering)
1
persevering(serious, resolute, persistent, unwavering)
1
persistent(serious, resolute, unwavering, gritty)
1
pitiless(brutal, barbarous)
1
plainspoken(reasonable, sensible, sober, practical)
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ChicagoSmart Define. 2013. "hardboiled thesaurus" https://smartdefine.org/hardboiled/thesaurus/synonyms (accessed September 25, 2026).
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MLASmart Define. "hardboiled thesaurus" 18 May 2013. Web. 25 September 2026. <https://smartdefine.org/hardboiled/thesaurus/synonyms>