somnifer Adjective, somnifer ▼ ▶

1. somniferous, hypnagogic (causing sleep or drowsiness)
   Synonyms: hipnotic, hipnotizant, narcotic, soporific, soporifer, soporativ

Appox. usage (any sense): 4.17 per million words

hipnagogic Adjective, hipnagogic

1. hypnagogic

Appox. usage (any sense): 0.015 per million words