encainide vs antiarrhythmic

encainide and antiarrhythmic both are nouns.

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

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

encainide: antiarrhythmic drug (trade name Enkaid) used to treat life-threatening arrhythmias but increases the risk of sudden death in heart attack patients
antiarrhythmic: a drug used to treat an abnormal heart rhythm

Other hypernyms of encainide include antiarrhythmic drug, antiarrhythmic medication.

encainide (noun)	antiarrhythmic (noun)
antiarrhythmic drug (trade name Enkaid) used to treat life-threatening arrhythmias but increases the risk of sudden death in heart attack patients	a drug used to treat an abnormal heart rhythm