48 entries under foul topic. ×

14
noxious(adjective, help, bad, evil)
8
poisonous(adjective, bad, harmful, injurious)
6
dangerous(offensive, disgusting, fatal, noxious)
5
noisome(adjective, bad, evil, offensive)
4
injurious(adjective, bad, harmful, damaging)
4
malodorous(adjective, bad, offensive, disgusting)
4
mephitic(adjective, bad, evil, offensive)
3
insalubrious(offensive, disgusting, harmful, poisonous)
3
mischievous(adjective, offensive, disgusting, injurious)
3
unhealthy(adjective, offensive, disgusting, noxious)
3
unwholesome(adjective, offensive, disgusting, unhealthy)
2
bad(adjective, evil, offensive, corrupt)
2
nasty(adjective, bad, decayed, stinking)
2
offensive(adjective, bad, evil, disgusting)
2
unhealthful(offensive, disgusting, harmful, poisonous)
1
fetid(adjective, bad, offensive, disgusting)
1
nauseating(adjective, bad, offensive, disgusting)
1
putrid(adjective, bad, offensive, disgusting)
1
rank(adjective, bad, offensive, disgusting)
1
reeking(adjective, bad, offensive, disgusting)
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APASmart Define. (2015). pestilential thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/pestilential/thesaurus/synonyms
ChicagoSmart Define. 2015. "pestilential thesaurus" https://smartdefine.org/pestilential/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, pestilential thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/pestilential/thesaurus/synonyms>.
MLASmart Define. "pestilential thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/pestilential/thesaurus/synonyms>