valproic acid vs antiepileptic

valproic acid and antiepileptic both are nouns.

Word	Noun	Adjective	Verb	Adverb
valproic acid	Yes	No	No	No
antiepileptic	Yes	No	No	No

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

valproic acid: anticonvulsant (trade name Depokene) used to prevent some kinds of seizures
antiepileptic: a drug used to treat or prevent convulsions (as in epilepsy)

Other hypernyms of valproic acid include anticonvulsant, anticonvulsant drug, antiepileptic drug.

valproic acid (noun)	antiepileptic (noun)
anticonvulsant (trade name Depokene) used to prevent some kinds of seizures	a drug used to treat or prevent convulsions (as in epilepsy)