THESAURUS
mitigator
alleviative, alleviator, anodyne, assuager, balm, calmative, cushion, dolorifuge, lenitive, moderator, modulator, mollifier, pacificator, pacifier, palliative, peacemaker, restraining hand, salve, sedative, shock absorber, soother, soothing syrup, stabilizer, temperer, tranquilizer, wiser head