What is another word for heat engine?
Pronunciation: [hˈiːt ˈɛnd͡ʒɪn] (IPA) 
Heat engines are defined as machines that convert thermal energy into mechanical energy. The term heat engine is often used interchangeably with internal combustion engines, but there are other synonyms for this term. One of the most common synonyms is thermal engine, which refers to any machine that uses heat to generate power. Another synonym is combustion engine, which refers specifically to engines that burn fuel to generate power. Other synonyms include reciprocating engine, which refers to engines that use pistons and cylinders, and rotary engine, which refers to engines that use a circular motion to generate power. Ultimately, all these synonyms refer to machines that utilize heat to produce energy.
