medicament vs drug

medicament and drug both are nouns.

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

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

medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease
drug: a substance that is used as a medicine or narcotic

medicament (noun)	drug (noun)
(medicine) something that treats or prevents or alleviates the symptoms of disease	a substance that is used as a medicine or narcotic

medicament (verb)	drug (verb)
	administer a drug to
	use recreational drugs