Shadowboxing, the act of practicing boxing moves without a partner or actual opponent, can be described in many ways. Synonyms for shadowboxing include solo boxing, imaginary sparring, simulated fighting, mimicry drills, phantasmal pugilism, and ghostly boxing. Other options include phantom punches, self-contained combat, solitary practice, and mirror boxing. No matter how you describe it, shadowboxing is a popular way for boxers to improve their technique, footwork, and endurance. It's a great way to prepare for an upcoming fight and also a fun way to get some exercise. So, go ahead and try some phantom punches on your own - you might just become a champ!