phensuximide vs antiepileptic

phensuximide and antiepileptic both are nouns.

Word	Noun	Adjective	Verb	Adverb
phensuximide	Yes	No	No	No
antiepileptic	Yes	No	No	No

As nouns, antiepileptic is a hypernym of phensuximide; that is, antiepileptic is a word with a broader meaning than phensuximide:

Other hypernyms of phensuximide include anticonvulsant, anticonvulsant drug, antiepileptic drug.

phensuximide (noun)	antiepileptic (noun)
anticonvulsant (trade name Milontin) used to treat petit mal	a drug used to treat or prevent convulsions (as in epilepsy)