| Word | Definitions | Synonyms |
|---|---|---|
| soporiferous | (adjective) sleep inducing | Synonyms: hypnagogic, hypnogogic, somniferous, somnific, soporific |
| (adjective) inducing mental lethargy | Synonyms: narcotic, soporific | |
| soporific | (adjective) sleep inducing | Synonyms: hypnagogic, hypnogogic, somniferous, somnific, soporiferous |
| (adjective) inducing mental lethargy | Synonyms: narcotic, soporiferous |