sedative drug vs medicament

sedative drug and medicament both are nouns.

Word	Noun	Adjective	Verb	Adverb
sedative drug	Yes	No	No	No
medicament	Yes	No	No	No

As nouns, medicament is a hypernym of sedative drug; that is, medicament is a word with a broader meaning than sedative drug:

sedative drug: a drug that reduces excitability and calms a person
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of sedative drug include drug of abuse, street drug, medication, medicinal drug, medicine.

sedative drug (noun)	medicament (noun)
a drug that reduces excitability and calms a person	(medicine) something that treats or prevents or alleviates the symptoms of disease