- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
| extirpative(adjective, harmful, injurious, damaging, deadly) | |
| fatal(adjective, bad, evil, harmful, injurious) | |
| fell(adjective, harmful, injurious, damaging, deadly) | |
| filthy | |
| generate | |
| gross(adjective, nasty, offensive, terrible, disgusting) | |
| horrible(adjective, offensive, terrible, foul, disgusting) | |
| horrid(adjective, bad, nasty, offensive, terrible) | |
| importunate | |
| importune | |
| inoculable | |
| insanitary | |
| insufferable(adjective, nasty, offensive, unpleasant, terrible) | |
| internecine(adjective, bad, violent, harmful, injurious) | |
| invidious(adjective, nasty, offensive, terrible, disgusting) | |
| irking | |
| lethiferous(adjective, harmful, injurious, damaging, deadly) | |
| malefic(adjective, injurious, damaging, destructive) | |
| malevolent(adjective, bad, evil, nasty, terrible) | |
| malicious(bad, injurious, damaging, deadly, destructive) |
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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> |