When it comes to describing a fire, there are plenty of verbs that can replace "set afire". Some common alternatives include "ignite", "kindle", "spark", "light", "torch", "ignite", "enflame", "burn", and "incinerate". These verbs all convey the act of starting a fire or causing something to burn, but each has its own unique connotation depending on the context and intensity of the fire. For instance, "light" may be used for smaller fires or flames, while "incinerate" implies a complete destruction by burning to ashes. Choosing the right synonym for "set afire" can add vividness and specificity to your writing, making the description of the fire more compelling and engaging for your readers.