S: (n) float (something that floats on the surface of water)
S: (n) air bladder, swim bladder, float (an air-filled sac near the spinal column in many fishes that helps maintain buoyancy)
Verb
S: (v) float, drift, be adrift, blow (be in motion due to some air or water current) "The leaves were blowing in the wind"; "the boat drifted on the lake"; "The sailboat was adrift on the open sea"; "the shipwrecked boat drifted away from the shore"