noun (n)

• good-natured tolerance of delay or incompetence(noun.attribute)

  Synonym:
  longanimity, patience
  Antonym:
  impatience
  

  source: wordnet30
• a delay in enforcing rights or claims or privileges; refraining from acting(noun.act)

  Example:
  His forbearance to reply was alarming.
  

  source: wordnet30
• The act of forbearing or waiting; the exercise of patience.(noun)

  source: webster1913