noun (n)

• the character of the positive electric pole(noun.linkdef)

  Synonym:
  positiveness
  

  source: wordnet30
• a quality or state characterized by certainty or acceptance or affirmation and dogmatic assertiveness(noun.attribute)

  Synonym:
  positiveness, positivism
  Antonym:
  negativeness, negativism, negativity
  

  source: wordnet30
• the quality of being encouraging or promising of a successful outcome(noun.attribute)

  Synonym:
  advantageousness, favorableness, favourableness, positiveness, profitableness
  Antonym:
  unfavorableness, unfavourableness
  

  source: wordnet30
• an amount greater than zero(noun.attribute)

  Antonym:
  negativeness, negativity
  

  source: wordnet30
• the quality of being undeniable and not worth arguing about(noun.attribute)

  Synonym:
  incontrovertibility, incontrovertibleness, positiveness
  

  source: wordnet30
• Positiveness.(noun)

  source: webster1913