noun (n)

• lack of experience and the knowledge and understanding derived from experience(noun.cognition)

  Example:
  Procedural inexperience created difficulties.
  

  Synonym:
  rawness
  Antonym:
  experience
  

  source: wordnet30
• Absence or want of experience; lack of personal and experimental knowledge; as, the inexperience of youth.(noun)

  source: webster1913