a prearranged combat between two persons, fought with deadly weapons according to an accepted code of procedure, esp. to settle a private quarrel.

any contest between two persons or parties.

to fight in a duel.

noun

affair of honor , bout , challenge , engagement , fencing , joust , shootout , single combat , sword fight , affaire d\'honneur , combat , conflict , contest , dispute , fence , fight , monomachia , monomachy , oppose , rencontre , rencounter , spar

verb

battle , combat , fight , struggle , tilt , war , wrestle