What Is It Called When Someone Purposely Starts A Fire?

What Is It Called When Someone Purposely Starts A Fire? countable noun. An arsonist is a person who deliberately sets fire to a building or vehicle. Synonyms: pyromaniac, incendiary, firestarter More Synonyms of arsonist. What is it called when you intentionally start a fire? While states define the offense somewhat differently, arson is generally the