duel

(noun) a prearranged fight with deadly weapons by two people (accompanied by seconds) in order to settle a quarrel over a point of honor. Synonyms: affaire d'honneur.

(noun) any struggle between two skillful opponents (individuals or groups).

(verb) fight a duel, as over one's honor or a woman. Example: "In the 19th century, men often dueled over small matters."