noun (n)

• the property of flowing easily(noun.attribute)

  Synonym:
  fluidity, liquidity, liquidness, runniness
  

  source: wordnet30
• a changeable quality(noun.attribute)

  Example:
  A certain fluidness in his perception of time made him an unpredictable colleague.
  

  Synonym:
  fluidity
  

  source: wordnet30
• The state of being fluid; fluidity.(noun)

  source: webster1913