sleeping draught vs soporific

sleeping draught and soporific both are nouns.

Word	Noun	Adjective	Verb	Adverb
sleeping draught	Yes	No	No	No
soporific	Yes	Yes	No	No

As nouns, soporific is a hypernym of sleeping draught; that is, soporific is a word with a broader meaning than sleeping draught:

sleeping draught: a soporific drug in the form of a pill (or tablet or capsule)
soporific: a drug that induces sleep

Other hypernyms of sleeping draught include lozenge, pill, tab, tablet, hypnotic.

sleeping draught (noun)	soporific (noun)
a soporific drug in the form of a pill (or tablet or capsule)	a drug that induces sleep

sleeping draught (adjective)	soporific (adjective)
	sleep inducing
	inducing mental lethargy