noun (n)

• the state of being that is commonly observed(noun.state)

  Synonym:
  expectedness
  

  source: wordnet30
• the quality of lacking taste and refinement(noun.attribute)

  Synonym:
  coarseness, grossness, raunch, vulgarism, vulgarity
  

  source: wordnet30
• ordinariness as a consequence of being frequent and commonplace(noun.attribute)

  Synonym:
  commonplaceness, everydayness
  Antonym:
  uncommonness
  

  source: wordnet30
• sharing of common attributes(noun.attribute)

  Synonym:
  commonality
  Antonym:
  individualism, individuality, individuation
  

  source: wordnet30
• State or quality of being common or usual; as, the commonness of sunlight.(noun)

  source: webster1913