ptomaine vs ptomain

ptomaine and ptomain both are nouns.

Word	Noun	Adjective	Verb	Adverb
ptomaine	Yes	No	No	No
ptomain	Yes	No	No	No

As nouns, ptomaine and ptomain are synonyms defined as:

ptomaine and ptomain: any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria

ptomaine (noun)	ptomain (noun)
a term for food poisoning that is no longer in scientific use; food poisoning was once thought to be caused by ingesting ptomaines	any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria
any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria