Terminology
Robert Baden-Powell initially used the terms Scoutmaster and Cubmaster for adult leaders (coming from the English usage of the word as a synonym for "teacher"), and these terms are still used in some countries and units, including the United States. As the word master picked up old-fashioned connotations, it was replaced by other terms such as Scout Leader or Scouter in many Commonwealth countries, following The Scout Association in the United Kingdom.
Read more about this topic: Scout Leader