sedative vs medicament

sedative and medicament both are nouns.

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

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

sedative: 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 include drug of abuse, street drug, medication, medicinal drug, medicine.

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

sedative (adjective)	medicament (adjective)
tending to soothe or tranquilize