1
severely
1
something blasphemous(adverb, immorality, acts)
1
something fierce(adverb, immorality, acts)
1
something terrible(adverb, cruel, evil way)
1
spitefully(adverb, immorality, acts)
1
spunklessly
1
toughly(adverb, insensitively)
1
unchristianly(adverb, cruel, evil way)
1
uncompassionately
1
uncourageously
1
undaringly
1
undemonstratively(adverb, in a bad way)
1
unfeeling
1
unforgivingly
1
ungallantly
1
uninterestedly
1
unintrepidly
1
unkindheartedly(adverb, immorality, acts)
1
unpassionately
1
unremorsefully
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APASmart Define. (2016). heartlessly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/heartlessly/thesaurus/synonyms
ChicagoSmart Define. 2016. "heartlessly thesaurus" https://smartdefine.org/heartlessly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, heartlessly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/heartlessly/thesaurus/synonyms>.
MLASmart Define. "heartlessly thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/heartlessly/thesaurus/synonyms>