spontaneousness

/spɑnˈteɪniəsnəs/
noun
  1. The quality of being natural, unplanned, and done without effort or thought.
    • Her speech had a refreshing spontaneousness that captivated the audience.
    • The spontaneousness of their laughter made the party feel warm and genuine.
    • I love the spontaneousness of children's play—they don't overthink things.
Antonyms