Turbofans are a type of jet engine that powers most of the modern aircraft. However, there are many synonyms for the word "turbofan" used in the aerospace industry. Some common synonyms include "fan jet," "bypass engine," "high-bypass turboprop," "high-speed fan engine," "high-efficiency turbofan," and "twin-spool turbofan." These terms describe the different variations of turbofan engines, which vary based on their bypass ratio, compressor design, and other technical features. Regardless of the synonym used, turbofans represent a vital technology that has revolutionized air travel, making it faster, safer, and more efficient than ever before.