noun (n)

• the trait of being difficult to handle or overcome(noun.attribute)

  Synonym:
  mulishness, obstinance, stubbornness
  

  source: wordnet30
• resolute adherence to your own ideas or desires(noun.attribute)

  Synonym:
  bullheadedness, obstinance, pigheadedness, self-will, stubbornness
  

  source: wordnet30
• A fixedness in will, opinion, or resolution that can not be shaken at all, or only with great difficulty; firm and usually unreasonable adherence to an opinion, purpose, or system; unyielding disposition; stubborness; pertinacity; persistency; contumacy.(noun)

  source: webster1913