Synonyms of the word

soporiferous

• adj. (archaic) soporific, sleep-inducing.

depressant

• n. (pharmacology) A pharmacological substance which decreases neuronal or physiological activity.
• n. (mining) An agent that inhibits the flotation of a mineral or minerals.
• adj. Acting as a depressant.

hypnagogic

• adj. That induces sleep; soporific, somniferous.
• adj. That accompanies falling asleep; especially, pertaining to the semi-conscious period immediately preceding…

hypnogogic

• adj. Alternative spelling of hypnagogic.

narcotic

• n. Any substance or drug that reduces pain, induces sleep and may alter mood or behaviour.
• n. Any type of numbing drug.
• n. Certain illegal drugs.
• adj. Of, or relating to narcotics.
• adj. Inducing sleep; causing narcosis.

somniferous

• adj. causing or inducing sleep, normally with harmful overtones.

somnific

• adj. Causing sleep; somniferous.

soporific

• n. Something inducing sleep, especially a drug.
• n. (figuratively) Something boring or dull.
• adj. Tending to induce sleep.
• adj. (figuratively) Boring, dull.

uninteresting

• adj. Arousing little or no interest; boring or uneventful.