Synonyms|531Antonyms|137|Broader|0Narrower|0Related|146
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going through motions(expression, idiom)
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going with the flow(expression, idiom)
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hard
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hard-as-nails
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hard-boiled
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hard-hearted
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hard as nails(expression, idiom)
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hardheaded
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harsh
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having a killer instinct(expression, idiom)
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heartless
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iceberg
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immune to
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impassive
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imperceptive
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impervious to
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impracticable
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incompliant
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indifferent
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inexcitable
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ChicagoSmart Define. 2013. "hardboiled thesaurus" https://smartdefine.org/hardboiled/thesaurus/related (accessed September 27, 2026).
HarvardSmart Define 2013, hardboiled thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hardboiled/thesaurus/related>.
MLASmart Define. "hardboiled thesaurus" 18 May 2013. Web. 27 September 2026. <https://smartdefine.org/hardboiled/thesaurus/related>