1
fell(adjective, harmful, injurious, damaging, deadly)
1
fetid(adjective, bad, offensive, foul, disgusting)
1
generate
1
importunate
1
importune
1
internecine(adjective, violent, cruel, harmful, injurious)
1
lethally
1
lethiferous(adjective, harmful, injurious, damaging, deadly)
1
malicious(injurious, damaging, destructive, noxious, toxic)
1
miasmatic
1
miasmic
1
murderous(injurious, damaging, destructive, fatal, poisonous)
1
narcotic
1
nauseating(adjective, bad, offensive, foul, disgusting)
1
nocuous(injurious, damaging, destructive, noxious, toxic)
1
pandemic
1
plaguelike
1
plaguing
1
plaguy
1
poison(adjective, virulent)
11 years ago|5.6k views|share |citing 
APASmart Define. (2015). pestilential thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/pestilential/thesaurus/synonyms
ChicagoSmart Define. 2015. "pestilential thesaurus" https://smartdefine.org/pestilential/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, pestilential thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/pestilential/thesaurus/synonyms>.
MLASmart Define. "pestilential thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/pestilential/thesaurus/synonyms>