WordNet (r) 3.0 (2006):

speedway
    n 1: road where high speed driving is allowed
    2: a racetrack for racing automobiles or motorcycles

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "speedway":
   Autobahn, US highway, alley, alleyway, arterial, arterial highway,
   arterial street, artery, autoroute, autostrada, avenue,
   belt highway, blind alley, boulevard, bypass, byway, camino real,
   carriageway, causeway, causey, chaussee, circumferential, close,
   corduroy road, county road, court, crescent, cul-de-sac,
   dead-end street, dike, dirt road, drive, driveway, expressway,
   freeway, gravel road, highroad, highway, highways and byways,
   interstate highway, lane, local road, main drag, main road, mews,
   motorway, parkway, pave, paved road, pike, place, plank road,
   primary highway, private road, right-of-way, ring road, road,
   roadbed, roadway, route nationale, row, royal road, secondary road,
   state highway, street, superhighway, terrace, thoroughfare,
   through street, thruway, toll road, township road, turnpike,
   wynd



U.S. Gazetteer Places (2000):

Speedway, IN -- U.S. town in Indiana
   Population (2000):    12881
   Housing Units (2000): 6636
   Land area (2000):     4.754984 sq. miles (12.315352 sq. km)
   Water area (2000):    0.008244 sq. miles (0.021351 sq. km)
   Total area (2000):    4.763228 sq. miles (12.336703 sq. km)
   FIPS code:            71828
   Located within:       Indiana (IN), FIPS 18
   Location:             39.791943 N, 86.249988 W
   ZIP Codes (1990):     46224
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Speedway, IN
    Speedway