acrimony animosity animus antagonism bad blood enmity grudge harshness hatred hostility ill will malice resentment venom acerbity antipathy aversion bile dudgeon hate malevolence malignity mordacity pique retaliation ruthlessness spite spitefulness spleen umbrage unfriendliness variance vengeance vengefulness vindictiveness virulence hardness of heart ill feeling resentfulness revengefulness uncharitableness