Synonyms for soporific

Noun

1. soporific, hypnotic, drug, hypnagogue

usage: a drug that induces sleep

Adjective

1. soporific, soporiferous, somniferous, somnific, hypnogogic, hypnagogic, depressant (vs. stimulative)

usage: sleep inducing

2. narcotic, soporiferous, soporific, uninteresting (vs. interesting)

usage: inducing mental lethargy; "a narcotic speech"