Compression :: Compression (n.) The act of compressing, or state of being compressed..
Compressive :: Compressive (a.) Compressing, or having power or tendency to compress; as, a compressive force..
Incompressibility :: Incompressibility (n.) The quality of being incompressible, or incapable of reduction in volume by pressure; -- formerly supposed to be a property of liquids..
Incompressible :: Incompressible (a.) Not compressible; incapable of being reduced by force or pressure into a smaller compass or volume; resisting compression; as, many liquids and solids appear to be almost incompressible..