Sororicide is a word used to describe the act of killing one's sister. However, there are other words that can be used to describe the same act. These words include fratricide, which is the act of killing one's brother, and filicide, which is the killing of a child by a parent. Matricide and patricide also describe the act of killing one's mother and father, respectively. Familicide refers to the act of killing one's entire family, while parricide is a term that encompasses all forms of killing of close family members. While all of these words describe violent acts within families, they each have specific connotations and legal implications.