Feracities refer to brutal or savage behaviors, but there are many synonyms that can be used instead of this word. Some synonyms of feracities include cruelty, violence, barbarity, savagery, brutality, ferocity, monstrosity, atrocity, and viciousness. These words are often used to describe inhumane actions undertaken by humans or animals, and can be used to describe both personal and systematic behavior. It is important to use synonyms such as these, as they help to convey the true nature of the actions being described, and they help to make it clear that such behavior should never be tolerated or accepted.