5
boring(adjective, dull, dry, tedious, dreary)
5
dull(adjective, dry, boring, tedious, dreary)
5
horrible(adjective, awful, terrible, afraid)
5
killing(adjective, destruction, death, inexpedience, insalubrity)
5
cadaverous(adjective, live, gaunt, skeletal)
5
contagious(adjective, unhealthy, communicable)
5
corrupting(distressing, harmful, damaging, inexpedience, poisonous)
5
desperate(adjective, awful, terrible, horrible, afraid)
5
deucedly
5
direful(adjective, awful, terrible, strange, horrible)
5
dreary(adjective, dull, dry, boring, tedious)
5
evil(adjective, bad, cruel, unkind, distressing)
5
flagrant(adjective, awful, terrible, strange, horrible)
5
ghostly(adjective, boring, tedious, live, gaunt)
5
hair-raising(adjective, awful, terrible, strange, horrible)
5
helluva(adjective, awful, terrible, strange, horrible)
5
homicidal(adjective, murderous)
5
howling(adjective, awful, terrible, horrible, afraid)
5
madly
5
mischievous(offensive, cruel, foul, disgusting, unkind)
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APASmart Define. (2016). deadly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/deadly/thesaurus/synonyms
ChicagoSmart Define. 2016. "deadly thesaurus" https://smartdefine.org/deadly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, deadly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/deadly/thesaurus/synonyms>.
MLASmart Define. "deadly thesaurus" 26 March 2016. Web. 22 September 2026. <https://smartdefine.org/deadly/thesaurus/synonyms>