buoyant

buoyant
    adj 1: tending to float on a liquid or rise in air or gas;
           "buoyant balloons"; "buoyant balsawood boats"; "a floaty
           scarf" [syn: {buoyant}, {floaty}]
    2: characterized by liveliness and lightheartedness; "buoyant
       spirits"; "his quick wit and chirpy humor"; "looking bright
       and well and chirpy"; "a perky little widow in her 70s" [syn:
       {buoyant}, {chirpy}, {perky}]
    

Buoyant \Buoy"ant\, a. [From {Buoy}, v. t. & i.]
   1. Having the quality of rising or floating in a fluid;
      tending to rise or float; as, iron is buoyant in mercury.
      "Buoyant on the flood." --Pope.
      [1913 Webster]

   2. Bearing up, as a fluid; sustaining another body by being
      specifically heavier.
      [1913 Webster]

            The water under me was buoyant.       --Dryden.
      [1913 Webster]

   3. Light-hearted; vivacious; cheerful; as, a buoyant
      disposition; buoyant spirits. -- {Buoy"ant*ly}, adv.
      [1913 Webster]
    

45 Moby Thesaurus words for "buoyant":
      adaptable, adaptive, afloat, airy, animated, blithe, bouncy,
      breezy, bright, carefree, cheerful, convalescent, corky, debonair,
      ebullient, effervescent, elastic, expansive, extensile, flexible,
      flexile, floatable, floating, floaty, free and easy, jaunty, light,
      light-hearted, lighthearted, lightsome, lively, peppy, perky,
      recuperative, recuperatory, resilient, responsive, reviviscent,
      springy, stretch, stretchable, stretchy, supernatant, vivacious,
      volatile