2
evilly
2
malevolently
2
nastily
2
perniciously
2
unwholesomely
2
virulently
1
acutely
1
calamitously(adverb, destructively)
1
contrarily
1
corrodingly
1
corrosively
1
counterproductively
1
critically
1
dangerously
1
decidedly
1
deplorably
1
disapprovingly
1
disserviceably
1
distressingly
1
grievously(adverb, badly, very, unfortunately, sorely)
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APASmart Define. (2015). harmfully thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/harmfully/thesaurus/synonyms
ChicagoSmart Define. 2015. "harmfully thesaurus" https://smartdefine.org/harmfully/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, harmfully thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/harmfully/thesaurus/synonyms>.
MLASmart Define. "harmfully thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/harmfully/thesaurus/synonyms>