blocker vs medicament

blocker and medicament both are nouns.

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

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

blocker: a class of drugs that inhibit (block) some biological process
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

blocker (noun)	medicament (noun)
a class of drugs that inhibit (block) some biological process	(medicine) something that treats or prevents or alleviates the symptoms of disease
a football player whose responsibility is to block players attempting to stop an offensive play