The Collaborative International Dictionary of English v.0.48:

Sportsmanship \Sports"man*ship\, n.
   The practice of sportsmen; skill in field sports.
   [1913 Webster]
   [1913 Webster]

WordNet (r) 3.0 (2006):

sportsmanship
    n 1: fairness in following the rules of the game

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "sportsmanship":
   candor, cricket, fair play, fair shake, fair-mindedness, fairness,
   good sportsmanship, honesty, honor, honorableness, integrity,
   justice, justness, probity, scrupulousness, sportsmanlikeness,
   sportsmanliness, square deal, the fair thing, the handsome thing,
   the proper thing, uprightness