Single prop is a common term used in aviation to refer to an aircraft with only one engine. However, there are various synonyms that can be used to describe this type of aircraft. Some of the commonly used synonyms include piston aircraft, monoplane, and single-engine plane. Piston aircraft refers to the type of engine used in single prop aircraft. Monoplane is a term that is used to describe a type of aircraft that has one pair of wings. Lastly, single-engine plane is a general term that is used to describe any type of aircraft that has only one engine. Regardless of the term used, single prop aircraft are widely used in different industries, including agriculture, firefighting, and transportation.