ptomain vs aminoalkane

ptomain and aminoalkane both are nouns.

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

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

ptomain: any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria
aminoalkane: a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals

Other hypernyms of ptomain include amine.

ptomain (noun)	aminoalkane (noun)
any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria	a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals