- Definitions|2
- Thesaurus|1.7k
- Abbreviations|0
| virulent(adjective, mean, evil, nasty) | |
| lethal(adjective, evil, harmful, injurious) | |
| malicious(adjective, mean, wrong, evil) | |
| venomous(adjective, mean, evil, nasty) | |
| fatal(adjective, evil, harmful, injurious) | |
| vicious(adjective, mean, evil, nasty) | |
| devastating(adjective, evil, wicked, harmful) | |
| malevolent(adjective, mean, wrong, evil) | |
| sinister(adjective, evil, nasty, negative) | |
| pestiferous(adjective, evil, harmful, injurious) | |
| pestilential(adjective, evil, harmful, injurious) | |
| mortal(adjective, evil, harmful, injurious) | |
| wicked(adjective, mean, wrong, evil) | |
| hateful(adjective, mean, wrong, evil) | |
| iniquitous(distressing, harmful, damaging, deadly) | |
| nefarious(evil, low, corrupt, harmful) |
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| APA | Smart Define. (2016). deleterious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/deleterious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "deleterious thesaurus" https://smartdefine.org/deleterious/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, deleterious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/deleterious/thesaurus/synonyms>. |
| MLA | Smart Define. "deleterious thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/deleterious/thesaurus/synonyms> |