| Word | Definitions | Synonyms |
|---|---|---|
| somniferous | (adjective) sleep inducing | Synonyms: hypnagogic, hypnogogic, somnific, soporiferous, soporific |
| somnific | (adjective) sleep inducing | Synonyms: hypnagogic, hypnogogic, somniferous, soporiferous, soporific |
| somnolent | (adjective) inclined to or marked by drowsiness | Synonyms: slumberous, slumbery, slumbrous |