noun (n)

• a feeling of refreshing tranquility and an absence of tension or worry(noun.feeling)

  Example:
  The easiness we feel when sleeping.
  

  Synonym:
  relaxation
  

  source: wordnet30
• freedom from difficulty or hardship or effort(noun.attribute)

  Example:
  The very easiness of the deed held her back.
  

  Synonym:
  ease, simpleness, simplicity
  Antonym:
  difficultness, difficulty
  

  source: wordnet30
• the quality of being easy in behavior or style(noun.act)

  Example:
  There was an easiness between them.
  A natural easiness of manner.
  

  source: wordnet30
• The state or condition of being easy; freedom from distress; rest.(noun)

  source: webster1913