noun (n)

• something serving to conceal plans; a fictitious reason that is concocted in order to conceal the real reason(noun.communication)

  Synonym:
  stalking-horse
  

  source: wordnet30
• an artful or simulated semblance(noun.attribute)

  Synonym:
  guise, pretence, pretense
  

  source: wordnet30
• Ostensible reason or motive assigned or assumed as a color or cover for the real reason or motive; pretense; disguise.(noun)

  source: webster1913