Extreme cruelty is a term used to describe acts of violence and abuse that are particularly heinous and inhumane. The two crossword solutions for this term are SADISM (6 letters) and TORTURE (7 letters). SADISM is defined as the enjoyment of inflicting pain or humiliation on others, while TORTURE is the intentional infliction of physical or mental suffering. Both of these acts are considered extreme cruelty and are widely condemned by society.