Gas burners are devices used to produce heat or flame for a variety of purposes. The most common type is the Etna, which is a four-letter word in the crossword. It is a gas-powered stovetop burner that is used for cooking. The Bunsen burner is another type of gas burner, and it is a six-letter word in the crossword. This device is used in laboratories to heat substances and create flames. The pilotlight is a ten-letter word in the crossword, and it is a small flame that is kept lit at all times to ignite the main flame of a gas appliance. Finally, the pistongine is a ten-letter word in the crossword, and it is a type of gas burner that uses a piston to create a flame.