Synonyms to hard feelings

acerbity, acescency, acid, acidity, acidness, acidulousness, acridity, acridness, acrimony, animosity, asperity, astringence, astringency, bile, bite, bitingness, bitter pill, bitter resentment, bitterness, bitterness of spirit, causticity, causticness, choler, corrosiveness, crabbedness, cuttingness, dourness, dryness, edge, fierceness, gall, gall and wormwood, gnashing of teeth, greenness, grip, harshness, heartburning, hyperacidity, incisiveness, keenness, mordacity, mordancy, piercingness, piquancy, poignancy, point, pungency, rancor, rankling, rigor, roughness, severity, sharpness, slow burn, soreness, sour, sourishness, sourness, spleen, stabbingness, sting, stridency, stringency, subacidity, surliness, tartishness, tartness, teeth, trenchancy, unripeness, unsweetness, vehemence, verjuice, vinegariness, vinegarishness, violence, virulence, DET, DMT, Foamite, LSD, Mary Jane, STP, THC, acerb, acerbate, acerbic, acetic, acetose, acetous, acetylsalicylic acid, acidic, acidulant, acidulated, acidulent, acidulous, acrid, acrimonious, actual c