Definitions of duel:

• noun:   any struggle between two skillful opponents (individuals or groups)
• noun:   a prearranged fight with deadly weapons by two people (accompanied by seconds) in order to settle a quarrel over a point of honor
• verb:   fight a duel, as over one's honor or a woman

  Example: "In the 19th century, men often dueled over small matters"

• name:  A surname (very rare: popularity rank in the U.S.: #85684)