acrimony, virulency, acerbity, acridity, rancor, mordancy, sharpness, bile, embitterment, harshness, feelings, acridness, moroseness, asperity, acidity, sourness, severity, unkindness, vitriol, gall, tartness, causticity, rancorousness, acidness, malignity, resentfulness
aggravation (part of speech: noun)
exacerbation, pique, irritation, harassment, aggravation, perturbation, inflammation, exasperation, discomposure, bother, torment, resentment, petulance, vexation, arousal, disturbance, indignation, enragement, provocation, trouble, scorn, bedevilment, annoyance, ire
malevolence (part of speech: noun)
foulness, spitefulness, bane, hurtfulness, hatred, nastiness, evil, bitterness, meanness, animosity, maliciousness, ill nature, malice, antagonism, wickedness, venom, malignancy, viciousness, malevolence, corrosiveness, cattiness, sinisterness, hatefulness
- It was the experiments and comparative studies of Theobald Smith, however, which attracted special attention to the difference in virulence shown by tubercle bacilli from human and bovine sources when inoculated upon cattle. - "Special Report on Diseases of Cattle", U.S. Department of Agriculture J.R. Mohler.
- The assault was directed with especial bitterness against Clay, whom Jackson ever afterwards included in the very large list of individuals whom he hated with the most rancorous and unreasoning virulence. - "Thomas Hart Benton", Theodore Roosevelt.
- It is a little curious, considering the devotion of latter- day men of letters to tobacco, that in their early days so many of the men who wrote on the subject attacked the social use of tobacco with violence and virulence. - "The Social History of Smoking", G. L. Apperson.