3 entries under callously topic. ×

5
indifferently(adverb, cruelly, coldly, insensitively, in a bad way)
3
insensitively(adverb, harshly, cruelly, indifferently, coldly)
1
uncaringly(adverb, cruelly, indifferently, coldly)
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APASmart Define. (2016). hardheartedly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/hardheartedly/thesaurus/synonyms
ChicagoSmart Define. 2016. "hardheartedly thesaurus" https://smartdefine.org/hardheartedly/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, hardheartedly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hardheartedly/thesaurus/synonyms>.
MLASmart Define. "hardheartedly thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/hardheartedly/thesaurus/synonyms>