The word fusibleness refers to the ability of a substance to be melted at high temperatures. Some synonyms for fusibleness include malleability, ductility, and pliability. Malleability refers to the ability of a substance to be shaped or formed by hammering or pressing. Ductility refers to the ability of a substance to be stretched or drawn into a thin wire. Pliability refers to the ability of a substance to bend or flex without breaking. Other synonyms for fusibleness include softness, moldability, and workability. These words are often used in the fields of metallurgy and materials science to describe the physical properties of various metals and alloys.