Antonyms of adj somniferous

1 sense of somniferous

Sense 1
soporific, soporiferous, somniferous, somnific, hypnogogic, hypnagogic -- (sleep inducing)

INDIRECT (VIA depressant) -> stimulative -- (capable of arousing or accelerating physiological or psychological activity or response by a chemical agent)

Similarity of adj somniferous

1 sense of somniferous

Sense 1
soporific, soporiferous, somniferous, somnific, hypnogogic, hypnagogic -- (sleep inducing)
       => depressant (vs. stimulative) -- (capable of depressing physiological or psychological activity or response by a chemical agent)