- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
| annoying(adjective, nasty, unpleasant, disgusting, hateful) | |
| pernicious(adjective, bad, evil, harmful, injurious) | |
| pestilential(adjective, bad, evil, harmful, injurious) | |
| pesky(adjective, tough, nasty, offensive, terrible) | |
| pestilent(adjective, harmful, dangerous, fatal, poisonous) | |
| baneful(adjective, bad, evil, harmful, injurious) | |
| bothersome(adjective, annoying) | |
| irritating | |
| harmful(adjective, bad, injurious, damaging, deadly) | |
| noxious(adjective, bad, evil, harmful, injurious) | |
| vexatious | |
| deleterious(adjective, bad, evil, harmful, injurious) | |
| galling | |
| noisome(adjective, bad, evil, offensive, immoral) | |
| pestering | |
| teasing | |
| destructive(adjective, bad, harmful, injurious, noxious) | |
| nettlesome | |
| plaguey | |
| toxic(adjective, bad, evil, harmful, injurious) |
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| APA | Smart Define. (2015). pestiferous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/pestiferous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "pestiferous thesaurus" https://smartdefine.org/pestiferous/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, pestiferous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/pestiferous/thesaurus/synonyms>. |
| MLA | Smart Define. "pestiferous thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/pestiferous/thesaurus/synonyms> |