Enkaid vs antiarrhythmic drug

Enkaid and antiarrhythmic drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
Enkaid	Yes	No	No	No
antiarrhythmic drug	Yes	No	No	No

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

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

Other hypernyms of Enkaid include antiarrhythmic, antiarrhythmic medication.

Enkaid (noun)	antiarrhythmic drug (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