WordNet (r) 3.0 (2006):

stabilizer
    n 1: a chemical that is added to a solution or mixture or
         suspension to maintain it in a stable or unchanging state
    2: airfoil consisting of a device for stabilizing an aircraft
    3: a device for making something stable [syn: stabilizer,
       stabiliser]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "stabilizer":
   alleviative, alleviator, anodyne, assuager, balance,
   balance rudder, balance wheel, ballast, balm, calmative,
   counterbalance, counterweight, cushion, dolorifuge, fin, fixative,
   flywheel, governor, gyroscope, hairspring, keel, lenitive,
   mitigator, moderator, modulator, mollifier, mordant, pacificator,
   pacifier, palliative, peacemaker, pendulum, restraining hand,
   salve, sedative, shock absorber, soother, soothing syrup, springs,
   stabilizator, stiffening, tail plane, temperer, tranquilizer,
   wiser head