3
defamatory
3
final(adjective, deadly)
3
horrid(adjective, bad, taste, offensive, awful)
3
life-threatening(adjective, dangerous)
3
malefic(adjective, threatening, injurious, damaging, deadly)
3
malodorous(adjective, bad, offensive, heavy, foul)
3
mean(adjective, nasty, attitude, violent, wild)
3
miasmatic(adjective, harmful)
3
nauseous(adjective, taste, awful, terrible, apperance)
3
putrid(adjective, taste, awful, violent, terrible)
3
repulsive(adjective, bad, nasty, offensive, awful)
3
savage
3
severe(adjective, bad, offensive, foul, revolting)
3
sharp
3
sinister(adjective, bad, evil, nasty, threatening)
3
uncool(adjective, mean, bad, nasty, awful)
3
unhygienic(adjective, dirty, unhealthy, harmful, polluted)
3
unsanitary(adjective, dirty, unhealthy, harmful, polluted)
3
wicked(adjective, mean, bad, evil, nasty)
2
acid
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>