Mesantoin vs mephenytoin

Mesantoin and mephenytoin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mesantoin	Yes	No	No	No
mephenytoin	Yes	No	No	No

As nouns, Mesantoin and mephenytoin are synonyms defined as:

Mesantoin and mephenytoin: a toxic anticonvulsant drug (trade name Mesantoin) used in the treatment of epilepsy when less toxic anticonvulsants have been ineffective

Mesantoin (noun)	mephenytoin (noun)
a toxic anticonvulsant drug (trade name Mesantoin) used in the treatment of epilepsy when less toxic anticonvulsants have been ineffective	a toxic anticonvulsant drug (trade name Mesantoin) used in the treatment of epilepsy when less toxic anticonvulsants have been ineffective