Synonyms and related words :
analgesic, anodyne, appeasing, calmant, calmative, calming, cradling, depressant, dreamy, drowsy, gentling, hushing, hypnotic, lulling, mollifying, narcotic, pacifying, paregoric, quietening, restful, rocking, sedative, sleep-inducing, somnifacient, somniferous, soothful, soothing, soporific, stilling