buoyancy

noun

  1. 1

    irrepressible liveliness and good spirit

    I admired his buoyancy and persistent good humor

  2. 2

    the tendency to float in water or other liquid

  3. 3

    the property of something weightless and insubstantial

  4. 4

    cheerfulness that bubbles to the surface

Synonyms

Also useful for “buoyancy”:Unscrambler