43 entries under adverb topic. ×

1
hardheartedly
1
inhumanely
1
insanely
1
neurotically
1
nuttily
1
pitilessly
1
psychotically
1
ruthlessly
1
stonily
1
unfeelingly
1
unmercifully
1
unpityingly
1
unsympathetically
1
viciously
1
villainously
0
barbarously
0
fiercely
0
ghoulishly
0
horribly(extremely, hellishly)
0
impishly
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APASmart Define. (2015). fiendishly thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fiendishly/thesaurus/synonyms
ChicagoSmart Define. 2015. "fiendishly thesaurus" https://smartdefine.org/fiendishly/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, fiendishly thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fiendishly/thesaurus/synonyms>.
MLASmart Define. "fiendishly thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/fiendishly/thesaurus/synonyms>