- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
| toxiferous | |
| vicious(adjective, bad, evil, nasty, terrible) | |
| wearisome | |
| worrisome | |
| worrying | |
| abhorrent(adjective, nasty, offensive, terrible, disgusting) | |
| abominable(adjective, nasty, offensive, terrible, disgusting) | |
| annihilative(adjective, harmful, injurious, damaging, deadly) | |
| awful(adjective, nasty, offensive, terrible, foul) | |
| bad for | |
| beastly(adjective, nasty, offensive, unpleasant, disgusting) | |
| bothering | |
| burdensome | |
| calamitous(adjective, harmful, injurious, damaging, deadly) | |
| cancerous(adjective, harmful, injurious, damaging, deadly) | |
| cataclysmic(adjective, harmful, injurious, damaging, deadly) | |
| catastrophic(adjective, harmful, injurious, damaging, deadly) | |
| communicable | |
| consumptive(adjective, bad, painful, harmful, injurious) | |
| contaminate |
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| APA | Smart Define. (2015). pestiferous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/pestiferous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "pestiferous thesaurus" https://smartdefine.org/pestiferous/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, pestiferous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/pestiferous/thesaurus/synonyms>. |
| MLA | Smart Define. "pestiferous thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/pestiferous/thesaurus/synonyms> |