noun (n)

• wisdom that is recondite and abstruse and profound(noun.cognition)

  Synonym:
  abstruseness, abstrusity, profoundness, reconditeness
  

  source: wordnet30
• intellectual depth; penetrating knowledge; keen insight; etc(noun.attribute)

  Synonym:
  profoundness
  Antonym:
  shallowness, superficiality
  

  source: wordnet30
• the intellectual ability to penetrate deeply into ideas(noun.cognition)

  Synonym:
  astuteness, deepness, depth, profoundness
  

  source: wordnet30
• the quality of being physically deep(noun.attribute)

  Example:
  The profundity of the mine was almost a mile.
  

  Synonym:
  deepness, profoundness
  Antonym:
  shallowness
  

  source: wordnet30
• The quality or state of being profound; depth of place, knowledge, feeling, etc.(noun)

  source: webster1913