Test flights are an essential part of the aviation industry. It is a process that checks the performance and safety of an aircraft before it is approved for commercial use. However, not everyone may be familiar with the term "test flight". Some synonyms for this term include trial flight, evaluation flight, verification flight, and demonstration flight. These terms all refer to the same meaning, which is to test the aircraft's capabilities. Test flights may occur during the research and development stage of an aircraft or while testing new modifications or upgrades. Understanding these synonyms can help in communicating effectively in the aviation industry and ensure the safe and successful operation of aircraft.