floatative
/fləʊtətɪv/Definitions
1. adjective
relating to or given to floating or buoyancy; capable of floating
“The floatative properties of the new material made it an ideal choice for life jackets.”
2. noun
a thing that floats or is capable of floating
“The floatative was a small, inflatable device that could be used to keep a person afloat in the water.”