50 entries under bad topic. ×

14
noxious(adjective, help, evil, foul)
13
pestiferous(adjective, evil, harmful, injurious)
12
deadly(adjective, help, evil, harmful)
12
baneful(adjective, help, evil, harmful)
11
pernicious(adjective, help, evil, harmful)
9
fatal(adjective, evil, harmful, injurious)
9
toxic(adjective, evil, harmful, injurious)
8
lethal(adjective, evil, harmful, injurious)
8
poisonous(adjective, foul, harmful, injurious)
6
detrimental(adjective, evil, harmful, injurious)
5
deleterious(adjective, evil, harmful, injurious)
5
noisome(adjective, evil, offensive, foul)
5
venomous(adjective, evil, harmful, injurious)
4
evil(adjective, corrupt, harmful, injurious)
4
foul(adjective, offensive, disgusting, vile)
4
hurtful(adjective, evil, harmful, injurious)
4
injurious(adjective, foul, harmful, damaging)
4
malodorous(adjective, offensive, foul, disgusting)
4
mephitic(adjective, evil, offensive, foul)
4
mortal(adjective, evil, harmful, injurious)
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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>