noun (n)

• time need to prepare a vessel or ship for a return trip(noun.time)

  Synonym:
  turnaround time
  

  source: wordnet30
• a decision to reverse an earlier decision(noun.cognition)

  Synonym:
  change of mind, flip-flop, reversal, turnabout
  

  source: wordnet30
• an area sufficiently large for a vehicle to turn around(noun.artifact)

  source: wordnet30
• act or process of unloading and loading and servicing a vessel or aircraft for a return trip(noun.act)

  Synonym:
  turnround
  

  source: wordnet30
• turning in the opposite direction(noun.act)

  Synonym:
  reversal, reverse, reversion, turnabout
  

  source: wordnet30