Synonyms and related words :
acrid, antagonistic, antipathetic, bad, baleful, baneful, belligerent, bitchy, bitter, black, caustic, clashing, colliding, conflicting, corroding, corrosive, corrupting, corruptive, counterproductive, criminal, damaging, deadly, deleterious, despiteful, detrimental, disadvantageous, disserviceable, distressing, evil, evil-disposed, full of hate, harmful, hateful, hostile, hurtful, ill, ill-affected, ill-conditioned, ill-disposed, ill-intentioned, ill-natured, improper, inaccurate, inauspicious, inexpedient, inferior, injurious, invalid, lethal, malefic, maleficent, malicious, malign, malignant, mischievous, noisome, noxious, ominous, peccant, pernicious, poisonous, prejudicial, quarrelsome, rancorous, repugnant, scatheful, set against, sinful, sinister, sore, spiteful, toxic, unfavorable, unhealthy, unkind, unpleasant, unskillful, untoward, venenate, veneniferous, venenous, venomous, vicious, virulent, vitriolic, wicked, wrong