Other forms: pugilists
Pugilist is a fancy word for boxer, one who indulges in the noble art of pugilism, or fighting with one's fists.
Be warned when people use the term pugilist or you see it in the paper. Nowadays such a term is often sarcastic in tone and critical of boxing's claims for legitimacy, often suggesting it's essentially savagery masquerading as sport. If you hear "the term "fighter" you can be more certain it's used with approval, or at least without prejudice.