The term TRAIN FOR A BOUT can be broken down into two crossword solutions: SPAR (4 letters) and SHADOWBOX (9 letters). SPARring is a form of training in which two people practice boxing with each other, usually wearing protective gear. Shadowboxing is a form of training in which a boxer practices their punches, footwork, and defensive moves without an opponent. Both of these activities are important for preparing for a bout, or a boxing match.