General Melting:
* Fusion: This is the most common and general term for the process of changing from a solid to a liquid.
* Liquefaction: This term emphasizes the transformation into a liquid state.
* Melting: This word is often used in everyday language and is also acceptable in scientific contexts.
Specific Melting:
* Sintering: This refers to the melting and fusing of particles at high temperatures.
* Ablation: This refers to the removal of material due to melting and vaporization, often used in the context of spacecraft re-entry.
* Solidification: This is the opposite of melting, the process of changing from a liquid to a solid.
The best scientific word to use depends on the specific context and the type of melting that is occurring.