anticonvulsant vs antiepileptic drug

anticonvulsant and antiepileptic drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
anticonvulsant	Yes	No	No	No
antiepileptic drug	Yes	No	No	No

As nouns, anticonvulsant and antiepileptic drug are synonyms defined as:

anticonvulsant and antiepileptic drug: a drug used to treat or prevent convulsions (as in epilepsy)

Other synonyms of anticonvulsant include anticonvulsant drug, antiepileptic.

anticonvulsant (noun)	antiepileptic drug (noun)
a drug used to treat or prevent convulsions (as in epilepsy)	a drug used to treat or prevent convulsions (as in epilepsy)