noun (n)

• a device resembling a sling that is used in various primitive societies to propel a dart or spear(noun.artifact)

  Synonym:
  dart thrower, spear thrower, throwing board
  

  source: wordnet30
• a curved piece of wood; when properly thrown will return to thrower(noun.artifact)

  Synonym:
  boomerang, throw stick
  

  source: wordnet30