flecainide vs antiarrhythmic

flecainide and antiarrhythmic both are nouns.

Word	Noun	Adjective	Verb	Adverb
flecainide	Yes	No	No	No
antiarrhythmic	Yes	No	No	No

As nouns, antiarrhythmic is a hypernym of flecainide; that is, antiarrhythmic is a word with a broader meaning than flecainide:

flecainide: oral antiarrhythmic medication (trade name Tambocor) used as a last resort in treating arrhythmias; increases the risk of sudden death in heart attack patients
antiarrhythmic: a drug used to treat an abnormal heart rhythm

Other hypernyms of flecainide include antiarrhythmic drug, antiarrhythmic medication.

flecainide (noun)	antiarrhythmic (noun)
oral antiarrhythmic medication (trade name Tambocor) used as a last resort in treating arrhythmias; increases the risk of sudden death in heart attack patients	a drug used to treat an abnormal heart rhythm