Combustion is a process that involves the burning of a fuel, resulting in the release of energy in the form of heat and light. There are many different words that can be used as synonyms for the word combustion, including burning, firing, ignition, and incineration. Other synonyms include conflagration, flame, blaze, kindling, and torching. Each of these terms describes the process of combustion in a slightly different way, adding different nuances to the meaning of the word. Whether you are writing about a scientific process or describing a fiery scene, using these synonyms can help you add variety and interest to your writing.