noun (n)

• someone who torments(noun.person)

  Synonym:
  persecutor, tormentor
  

  source: wordnet30
• a flat at each side of the stage to prevent the audience from seeing into the wings(noun.artifact)

  Synonym:
  teaser, tormentor
  

  source: wordnet30
• One who, or that which, torments; a tormentor.(noun)

  source: webster1913