hydantoin vs anticonvulsant

hydantoin and anticonvulsant both are nouns.

Word	Noun	Adjective	Verb	Adverb
hydantoin	Yes	No	No	No
anticonvulsant	Yes	No	No	No

As nouns, anticonvulsant is a hypernym of hydantoin; that is, anticonvulsant is a word with a broader meaning than hydantoin:

hydantoin: any of a group of anticonvulsant drugs used in treating epilepsy
anticonvulsant: a drug used to treat or prevent convulsions (as in epilepsy)

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

hydantoin (noun)	anticonvulsant (noun)
any of a group of anticonvulsant drugs used in treating epilepsy	a drug used to treat or prevent convulsions (as in epilepsy)