There are several synonyms for the word "sleep-inducer" which can be used in place of the same to describe something that helps induce sleep. Some of the commonly used synonyms for sleep-inducer are sedative, soporific, somnifacient, hypnotic, narcotic, calming, and relaxing. These words represent substances, activities, or conditions known to promote sleep, such as certain medications, relaxation techniques, and natural remedies. Whether used by individuals seeking a good night's rest or medical professionals prescribing sleep aids, sleep-inducing synonyms provide versatility in communication while describing a multitude of sleep-inducing agents.