cold medicine vs medicament

cold medicine and medicament both are nouns.

Word	Noun	Adjective	Verb	Adverb
cold medicine	Yes	No	No	No
medicament	Yes	No	No	No

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

cold medicine: medicine intended to relieve the symptoms of the common cold
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

cold medicine (noun)	medicament (noun)
medicine intended to relieve the symptoms of the common cold	(medicine) something that treats or prevents or alleviates the symptoms of disease