noun (n)

• the state of being alone in solitary isolation(noun.state)

  Synonym:
  solitariness
  

  source: wordnet30
• sadness resulting from being forsaken or abandoned(noun.feeling)

  Synonym:
  desolation, forlornness
  

  source: wordnet30
• a disposition toward being alone(noun.attribute)

  Synonym:
  aloneness, lonesomeness, solitariness
  

  source: wordnet30
• The condition of being lonely; solitude; seclusion.(noun)

  source: webster1913