Select the most appropriate one-word substitution for the given group of words.

An act of killing one's brother is called 

Fratricide

The most appropriate one-word substitution for "an act of killing one's brother" is ** fratricide**.

• Homicide is the killing of one person by another, regardless of the relationship between the two people.
• Patricide is the killing of one's father.
• Fratricide is the killing of one's brother or sister.
• Infanticide is the murder of a child, especially a newborn.