Quinidex vs antiarrhythmic

Quinidex and antiarrhythmic both are nouns.

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

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

Quinidex: cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias
antiarrhythmic: a drug used to treat an abnormal heart rhythm

Other hypernyms of Quinidex include antiarrhythmic drug, antiarrhythmic medication.

Quinidex (noun)	antiarrhythmic (noun)
cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias	a drug used to treat an abnormal heart rhythm