abating
allaying
alleviating
alleviative
analgesic
anesthetic
anodyne
assuaging
assuasive
balmy
balsamic
benumbing
blunting
cathartic
chastening
cleansing
cushioning
dampening
damping
deadening
demulcent
diminishing
easing
emollient
lenitive
lessening
mitigating
mitigative
narcotic
numbing
pain-killing
palliative
purgative
reducing
relaxing
relieving
remedial
softening
soothing
stunning
stupefying
subduing
tempering
culling
lulling
mulling