Synthesis gas is a term used to describe a mixture of hydrogen and carbon monoxide gases. It is also known as syngas or producer gas. The term "syngas" is commonly used in the field of chemistry and chemical engineering, while "producer gas" is typically used in the energy and power industries. Other synonyms for synthesis gas include synthesis gas mixture, synthesis gas stream, and gasification output. Synthesis gas is commonly produced through the gasification of carbon-based materials, such as coal, biomass, and waste, and has a wide range of applications, including in the production of synthetic fuels, chemicals, and electricity.