4
nauseating(adjective, bad, taste, offensive, awful)
4
obnoxious(adjective, bad, taste, nasty, offensive)
4
pathological(adjective, unhealthy)
4
rancid(adjective, awful, dirty, foul, gloom)
4
rotten(adjective, bad, nasty, violent, heavy)
4
sickening(adjective, bad, taste, offensive, awful)
4
slanderous(distressing, harmful, damaging)
4
toxiferous(adjective, harmful, insalubrity)
4
yucky(adjective, bad, nasty, offensive, awful)
3
abhorrent(adjective, bad, taste, nasty, awful)
3
adverse(adjective, awful, dirty, gloom, badly)
3
beastly(adjective, mean, nasty, awful, violent)
3
brackish(adjective, taste, awful, terrible, apperance)
3
calamitous(adjective, injurious, damaging, destructive, baneful)
3
catastrophic(adjective, injurious, damaging, destructive)
3
caustic
3
corrosive
3
counterproductive
3
cruel(adjective, mean, nasty, violent, wild)
3
cursed(adjective, taste, awful, terrible, apperance)
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>