moderating
alleviating
alleviator
analgesic
anesthetic
anodyne
assuager
assuasive
balm
balmy
balsamic
benumbing
calmant
calmative
cathartic
cleansing
cushion
deadening
demulcent
disburdening
disencumbering
dolorifuge
dulling
easing
emollient
lenitive
lightening
mitigating
mitigative
mitigator
moderator
modulator
mollifier
numbing
pacificator
pacifier
pain-killing
palliative
peacemaker
purgative
relieving
remedial
restraining hand
salve
sedative
shock absorber
softening
soother
soothing
soothing syrup