6
mischievous(adjective, mean, bad, evil, nasty)
6
nocuous(adjective, cruel, unkind, distressing, harmful)
6
ruinous(adjective, bad, distressing, harmful, injurious)
6
vile(adjective, taste, awful, violent, terrible)
5
bitter(adjective, mean, bad, nasty, hateful)
5
corrupt(adjective, offensive, foul, unhealthy, harmful)
5
corrupting(distressing, harmful, injurious, damaging, destructive)
5
hateful(adjective, mean, taste, nasty, attitude)
5
hostile(adjective, awful, dirty, gloom, badly)
5
icky(adjective, bad, nasty, offensive, awful)
5
insalubrious(adjective, offensive, foul, disgusting, unhealthy)
5
killing(adjective, deadly, inexpedience)
5
morbid(adjective, taste, awful, terrible, harmful)
5
pestiferous(adjective, bad, offensive, foul, disgusting)
5
sarcastic
4
acerbic
4
corruptive(adjective, harmful)
4
envenomed(inexpedience, insalubrity)
4
infective(adjective, harmful)
4
miasmic
11 years ago|15k views|share |citing 
APASmart Define. (2015). poisonous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/poisonous/thesaurus/synonyms
ChicagoSmart Define. 2015. "poisonous thesaurus" https://smartdefine.org/poisonous/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, poisonous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/poisonous/thesaurus/synonyms>.
MLASmart Define. "poisonous thesaurus" 19 August 2015. Web. 26 September 2026. <https://smartdefine.org/poisonous/thesaurus/synonyms>