Englishvenom
noun
1 vipers kill their victims by injecting them with venom:
poison, toxin;
archaic bane;
rare toxicant.
2 the venom in his voice was shocking:
rancour, malevolence, vitriol, spite, spitefulness, vindictiveness, malice, maliciousness, malignity, malignancy, viciousness, nastiness, ill will, ill feeling, animosity, animus, acrimony, acrimoniousness, bitterness, embitterment, embitteredness, sourness, resentment, grudgingness, virulence, antagonism, hostility, bad blood, bile, spleen, gall, enmity, hate, hatred, dislike, antipathy, aversion;
informal bitchiness, cattiness;
rare maleficence, causticity, mordacity.
▷antonyms love, goodwill.
venom Oxford Dictionary of English