Synonyms for bitterness

Some common synonyms of bitterness are: bitterness [n.] 1. Bitter taste, acridity, acridness. 2. Intensity, poignancy, grievousness, severity. 3. Spleen, gall, rankling, rancor, heart-burning, animosity, hatred, malice, malignity, spite, enmity, ill-will, bad blood. 4. Asperity, acerbity, severity, harshness, acrimony, ill-temper. 5. Distress, pain, grief, sorrow, affliction, heaviness, regret, despondency.