1
contaminative
1
corrupting(harmful, injurious, damaging, destructive, poisonous)
1
cutthroat(adjective, harmful, injurious, damaging, deadly)
1
dangerous(bad, offensive, foul, disgusting, fatal)
1
despicable(adjective, nasty, terrible, disgusting, vicious)
1
detestable(adjective, nasty, offensive, terrible, disgusting)
1
devastating(adjective, bad, evil, wicked, harmful)
1
dire(adjective, bad, painful, harmful, injurious)
1
disadvantageous(injurious, damaging, destructive)
1
disastrous(adjective, harmful, injurious, damaging, deadly)
1
disgusting(adjective, bad, nasty, offensive, terrible)
1
distressing
1
disturbing
1
endemic
1
enraging
1
epidemial
1
epiphytotic
1
eradicative(adjective, harmful, injurious, damaging, deadly)
1
evil(adjective, bad, nasty, terrible, disgusting)
1
execrable(adjective, nasty, terrible, disgusting, vicious)
11 years ago|8.5k views|share |citing 
APASmart Define. (2015). pestiferous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/pestiferous/thesaurus/synonyms
ChicagoSmart Define. 2015. "pestiferous thesaurus" https://smartdefine.org/pestiferous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, pestiferous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/pestiferous/thesaurus/synonyms>.
MLASmart Define. "pestiferous thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/pestiferous/thesaurus/synonyms>