rancorous Synonyms

embittered sullen splenetic spiteful sour savage revengeful retaliatory resentful poisonous petulant pernicious unkind vengeful unforgiving bitchy wreakful wicked vitriolic virulent viperish vindictive vindicatory vicious venomous peevish nasty mean cruel churlish caustic catty bitter baleful avenging antagonistic acrimonious acrid acidulent despiteful envenomed malignant malign malicious malevolent implacable ill-natured hostile hateful harsh