cadaverine vs ptomain

cadaverine and ptomain both are nouns.

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

As nouns, ptomain is a hypernym of cadaverine; that is, ptomain is a word with a broader meaning than cadaverine:

cadaverine: a colorless toxic ptomaine with an unpleasant odor formed during the putrefaction of animal tissue
ptomain: any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria

Other hypernyms of cadaverine include ptomaine.

cadaverine (noun)	ptomain (noun)
a colorless toxic ptomaine with an unpleasant odor formed during the putrefaction of animal tissue	any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria