There are a few synonyms for the word "carbonising," including "charcoalizing," "scorching," and "charring." "Charcoalizing" refers to the process of converting a material into charcoal by heating it in the absence of air. "Scorching" refers to the burning or heating of a material to the point of discoloration or damage. "Charring," on the other hand, involves the incomplete burning of a material, resulting in a blackened, carbonized surface. These synonyms are often used interchangeably depending on the context and the method of carbonization being used. Overall, each of these words describes a process that involves the transformation of a material into a carbon-rich substance.