Bitterness1. (n.) The quality or state of being bitter, sharp, or acrid, in either a literal or figurative sense; implacableness; resentfulness; severity; keenness of reproach or sarcasm; deep distress, grief, or vexation of mind.
2. (n.) A state of extreme impiety or enmity to God.
3. (n.) Dangerous error, or schism, tending to draw persons to apostasy.
Thesaurus Entries
absolute zero, acerbity, aching heart, acid, acidity, acidness, acidulousness, acridity, acridness, acrimony, agony, agony of mind, algidity, anguish, animosity, animus, antagonism, apologies, asperity, astringence, astringency, attrition, ayenbite of inwit, bad blood, bale, bile, bite, bitingness, bitter feeling, bitter pill, bitter resentment, bitterness, bitterness of spirit, bleakness, bleeding heart, briskness, broken heart, causticity, causticness, cheerlessness, chill, chilliness, choler, cold, coldness, comfortlessness, contriteness, contrition, cool, coolness, coolth, corrosiveness, crispness, crushing, cryogenics, cryology, cuttingness, decrease in temperature, depression, depth of misery, desolation, despair, discomfort, dismalness, distress, distressfulness, dreariness, edge, enmity, extremity, feud, fierceness, freezing point, freshness, frigidity, frostiness, gall, gall and wormwood, gelidity, gnashing of teeth, grief, grievousness, grip, hard feelings, harshness, hatred, heartache, heartburning, heavy heart, hostility, iciness, ill blood, ill feeling, ill will, incisiveness, inclemency, infelicity, intense cold, joylessness, keenness, lamentability, lamentation, low temperature, melancholia, melancholy, misery, mordacity, mordancy, mournfulness, nip, nippiness, pain, painfulness, pathos, piercingness, piquancy, pitiability, pitiableness, pitifulness, poignancy, point, prostration, pungency, rancor, rankling, rawness, regret, regretfulness, regrets, regrettableness, regretting, remorse, remorse of conscience, remorsefulness, repining, resentment, rigor, roughness, sadness, severity, shame, shamefacedness, shamefastness, shamefulness, sharp air, sharpness, slow burn, soreness, sorriness, sorrow, sorrowfulness, sourness, spleen, stabbingness, sting, stridency, stringency, suicidal despair, tartness, teeth, trenchancy, vehemence, vendetta, venom, violence, virulence, vitriol, wistfulness, woe, woebegoneness, woefulness, wretchedness