expectorant vs medicament

expectorant and medicament both are nouns.

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

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

expectorant: a medicine promoting expectoration
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of expectorant include medication, medicinal drug, medicine.

expectorant (noun)	medicament (noun)
a medicine promoting expectoration	(medicine) something that treats or prevents or alleviates the symptoms of disease