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somniferous
adjective
See more 4-syllable adjectives

How to pronounce somniferous:

Definition of somniferous:

somniferous (adjective):
soporific
adjective. sleep inducing.

Synonyms for somniferous:

depressant
drowsy
hypnogogic
hypnotic
hypnotizing
narcotic
opiate
sleepy
slumberous
slumbrous
somnific
somnolent
soothing
soporiferous
soporific

Antonyms for somniferous:

adrenalizing
animating
bracing
brisk
cordial
electrifying
encouraging
energising
energizing
enlivening
envigorating
exciting
exhilarating
fascinating
fortifying
fresh
galvanising
galvanizing
health-giving
healthful
healthy
heartening
hyper
inciteful
inspiring
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Other 4-syllable words

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Syllable Fun Fact
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