acerbity, acid, acidity, acidness, acidulousness, acridity, acrimony, anger, animosity, astringency, austerity, bad humor, bad temper, bile, biliousness, bitingness, bitter resentment, bitterness, bitterness of spirit, bumpiness, causticity, causticness, choler, choppiness, corrosiveness, cragginess, cuttingness, discontent, edge, gall, gnashing of teeth, granulation, grimness, hard feelings, hardness, hardship, harshness, heartburning, hispidity, ill humor, ill nature, ill temper, incisiveness, inclemency, inequality, irregularity, irritability, jaggedness, joltiness, keenness, mordacity, mordancy, nonuniformity, piercingness, piquancy, poignancy, pungency, raggedness, rancor, rankling, rigor, rough air, roughness, ruggedness, rugosity, scraggliness, severity, sharpness, slow burn, snappishness, soreness, sourness, spleen, stabbingness, stringency, tartness, tooth, trenchancy, turbulence, unevenness, unsmoothness, ununiformity, vicissitude, virulence, waspishness