What is another word for test fly?
Pronunciation: [tˈɛst flˈa͡ɪ] (IPA) 
Test fly is a term commonly used in aviation to describe the act of piloting an aircraft for the purpose of assessing its performance. However, there are a variety of synonyms that can be used to describe this process. Some of the most common include trial run, test flight, evaluation flight, proving, and certification. Other related terms that may be used include flight testing, aerodynamic testing, and prototype testing. No matter which term is used, the purpose remains the same - to ensure that the aircraft is safe and fully functional before it is put into service.
