From Longman Dictionary of Contemporary Englishacrimonyac‧ri‧mo‧ny /ˈækrəməni $ -moʊni/ noun [uncountable] formalANGRY feelings of anger between people who disagree strongly and do not like each other
Examples from the Corpus
acrimony• There has been acrimony between the two men ever since.• The survey did not go into reasons for the increase in acrimony.• After much acrimony, the effort failed.• Amid the acrimony, somebody actually published some data.• Today, thankfully, the acrimony is forgotten and only the coffee is bitter.Origin acrimony (1500-1600) Latin acrimonia, from acer; → ACRID 