Boxer
Part of speech: noun
Definition: A participant (fighter) in a boxing match. A breed of stocky, medium-sized, short-haired dog with a square-jawed muzzle. The person running a game of two-up.
Example sentence: I land a higher percentage of punches than any boxer in boxing.
Pugilist
Part of speech: noun
Definition: One who fights with his fists; esp., a professional prize fighter; a boxer.