noun (n)

• a single complete turn (axial or orbital)(noun.event)

  Synonym:
  revolution, rotation
  

  source: wordnet30
• the act of rotating in a circle or spiral(noun.act)

  Synonym:
  whirling
  

  source: wordnet30
• The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution.(noun)

  source: webster1913