Engaging in fisticuffs is a term used to describe a physical altercation between two people, usually involving punches and other forms of hand-to-hand combat. The crossword solutions for this term are BOX, which is a three letter word, and BRAWL, which is a five letter word. BOX is a term used to describe a fight that is not particularly serious, while BRAWL is a term used to describe a more intense physical altercation.