rancorous Synonyms

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