Amytal vs amobarbital

Amytal and amobarbital both are nouns.

Word	Noun	Adjective	Verb	Adverb
Amytal	Yes	No	No	No
amobarbital	Yes	No	No	No

As nouns, amobarbital is a hypernym of Amytal; that is, amobarbital is a word with a broader meaning than Amytal:

Amytal: the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
amobarbital: a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant

Amytal (noun)	amobarbital (noun)
the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic	a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant