Igor Sikorsky was a renowned aviation engineer and pioneer who made significant contributions to the field of aviation. There are several synonyms that one can use to describe him, including aviation inventor, helicopter design genius, and aviation entrepreneur. These terms highlight Sikorsky's impact on the aviation industry and his role in designing some of the most innovative aircrafts of his time. Additionally, he is often referred to as a visionary and a trailblazer, credited with creating the first successful helicopter that paved the way for modern-day aviation. Overall, Sikorsky's contributions to the world of aviation have left an indelible mark on the industry, making him an inspiration for future generations of aviation designers and engineers.