What is another word for "bitterness"?

Roget's Thesaurus (1911) lists these synonyms for "bitterness": accusation, acerbity, aching, acrid, acridity, acrimonious, acrimony, again, against, alas, alienate, alienation, amaritude, and, animosity, arms, austerity, bad, bear, behind, bewail, bitter, but, cast, cold, cool, day, deplore, disaffected, discontent, discord, disgust, dislike, drawn, enmity, estrange, estrangement, fall, friendly, fulsome.