Cordarone vs antiarrhythmic

Cordarone and antiarrhythmic both are nouns.

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

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

Cordarone: an antiarrhythmic drug (trade name Cordarone) that has potentially fatal side effects and is used to control serious heart rhythm problems only when safer agents have been ineffective
antiarrhythmic: a drug used to treat an abnormal heart rhythm

Other hypernyms of Cordarone include antiarrhythmic drug, antiarrhythmic medication.

Cordarone (noun)	antiarrhythmic (noun)
an antiarrhythmic drug (trade name Cordarone) that has potentially fatal side effects and is used to control serious heart rhythm problems only when safer agents have been ineffective	a drug used to treat an abnormal heart rhythm