sulfamezathine vs sulfamethazine

sulfamezathine and sulfamethazine both are nouns.

Word	Noun	Adjective	Verb	Adverb
sulfamezathine	Yes	No	No	No
sulfamethazine	Yes	No	No	No

As nouns, sulfamezathine and sulfamethazine are synonyms defined as:

sulfamezathine and sulfamethazine: a sulfa drug used like sulfadiazine and also in veterinary medicine

sulfamezathine (noun)	sulfamethazine (noun)
a sulfa drug used like sulfadiazine and also in veterinary medicine	a sulfa drug used like sulfadiazine and also in veterinary medicine