diphenylhydantoin vs phenytoin

diphenylhydantoin and phenytoin both are nouns.

Word	Noun	Adjective	Verb	Adverb
diphenylhydantoin	Yes	No	No	No
phenytoin	Yes	No	No	No

As nouns, diphenylhydantoin and phenytoin are synonyms defined as:

diphenylhydantoin and phenytoin: an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative

Other synonyms of diphenylhydantoin include Dilantin.

diphenylhydantoin (noun)	phenytoin (noun)
an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative	an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative