- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
| inexorable(adjective, evil, nasty, harsh, vicious) | |
| infective | |
| infernal | |
| inhumane(adjective, evil, nasty, harsh, vicious) | |
| injuriousness | |
| injury | |
| insalutary(adjective, offensive, foul, disgusting, harmful) | |
| intimidatory(adjective, negative emotions) | |
| killer | |
| lethiferous(adjective, harmful, injurious, damaging, deadly) | |
| life-threatening | |
| loathsome | |
| low(adjective, mean, bad, nasty, corrupt) | |
| lowery(adjective, negative emotions) | |
| malignancy | |
| mean(adjective, nasty, cruel, wicked, hateful) | |
| misbegotten | |
| mischief | |
| monstrous(adjective, evil, nasty, harsh, vicious) | |
| morbid |
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| APA | Smart Define. (2016). pernicious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/pernicious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "pernicious thesaurus" https://smartdefine.org/pernicious/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, pernicious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/pernicious/thesaurus/synonyms>. |
| MLA | Smart Define. "pernicious thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/pernicious/thesaurus/synonyms> |