WordNet (r) 3.0 (2006):

racecourse
    n 1: a course over which races are run [syn: racetrack,
         racecourse, raceway, track]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "racecourse":
   archery ground, athletic field, badminton court, baseball field,
   basketball court, billiard parlor, bowling alley, bowling green,
   course, court, cricket ground, croquet ground, croquet lawn,
   diamond, fairway, field, football field, glaciarium, golf course,
   golf links, gridiron, gym, gymnasium, ice rink, infield, links,
   outfield, oval, playground, playing field, playroom, polo ground,
   pool hall, poolroom, putting green, racket court, rink,
   skating rink, soccer field, squash court, stretch, tennis court,
   track, turf