160 entries under adjective topic. ×

7
vexing
6
infectious
6
plaguy
6
poisonous(bad, offensive, foul, disgusting)
6
unhealthy(offensive, foul, disgusting, injurious)
5
contaminated
5
contagious(annoying, communicable)
5
damaging(bad, harmful, injurious, deadly)
5
injurious(bad, foul, vile, harmful)
5
irksome
5
obnoxious(nasty, offensive, terrible, foul)
5
troublesome(bothersome, worrisome)
5
virulent(unhealthy, injurious, annoying, fatal)
4
aggravating
4
corruptive
4
deadly(bad, evil, harmful, injurious)
4
dirty
4
exasperating
4
perversive
4
venomous(bad, evil, harmful, injurious)
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APASmart Define. (2015). pestiferous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/pestiferous/thesaurus/synonyms
ChicagoSmart Define. 2015. "pestiferous thesaurus" https://smartdefine.org/pestiferous/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, pestiferous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/pestiferous/thesaurus/synonyms>.
MLASmart Define. "pestiferous thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/pestiferous/thesaurus/synonyms>