A briquette is a compressed block of coal, charcoal, or other combustible materials that are used for fuel. However, there are several other words that can be used as synonyms for this term. For instance, some people may use the word "log" to describe a similar type of fuel made from wood or other materials. Other possible synonyms might include "fuel pellet," "combustion block," or "heat cube." Ultimately, the specific synonym that is used will depend on the context and the type of material that is being used as fuel. Regardless of the term that is chosen, briquettes and their synonyms provide an efficient and reliable source of energy for many applications.