pernicious
I
adjective
adverse, affliciting, baleful, baneful, brutal, calamitous, catastrophic, corrosive, crippling, cruel, damaging, deadly, death-bringing, death-dealing, deathful, deathly, deleterious, destructive, detrimental, devouring, diabolic, dire, disadvantageous, disastrous, disserviceable, distressing, envenomed, evil, exitiosus, extirpative, fatal, fell, fiendish, fraught with evil, fraught with harm, harmful, hurtful, inimical, injurious, insalubrious, insidious, killing, lethal, malefic, maleficent, maleficial, malevolent, malign, malignant, menacing, mephitic, mischievous, morbiferous, morbific, mortal, murderous, nocent, noisome, noxious, noxius, painful, pemiciosus, pestiferous, pestilential, poisonous, ruinous, serious, sinister, tending to cause death, toxic, toxicant, toxiferous, treacherous, unhealthful, unhealthy, unkind, unpropitious, unwholesome, venomous, vicious, violent, virulent, wicked
II
index
bad (offensive), deadly, deleterious, destructive, detrimental, disadvantageous, disastrous, fatal, harmful, heinous, immoral, inadvisable, incendiary, inimical, iniquitous, insalubrious, lethal, malevolent, malicious, malignant, nefarious, noxious, objectionable, obnoxious, oppressive, pestilent, prejudicial, sinister, toxic, vicious, virulent
Burton's Legal Thesaurus.
William C. Burton.
2006