noun (n)

• persistent determination(noun.attribute)

  Synonym:
  doggedness, persistence, persistency, pertinacity, tenaciousness, tenacity
  

  source: wordnet30
• the act of persisting or persevering; continuing or repeating behavior(noun.act)

  Synonym:
  perseveration, persistence
  

  source: wordnet30
• The act of persevering; persistence in anything undertaken; continued pursuit or prosecution of any business, or enterprise begun.(noun)

  source: webster1913