allay
appease
calm
cool
defuse
dulcify
lay
lay the dust
mollify
pacify
placate
pour balm on
propitiate
reconcile
smooth
smooth down
smooth over
soothe
tranquilize
calm down
harmonise
harmonize
lull
quiet
quieten
still
tranquillise
tranquillize
conciliated
conciliates
conciliating