amobarbital vs barbiturate

amobarbital and barbiturate both are nouns.

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

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

amobarbital: a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant
barbiturate: organic compound having powerful soporific effect; overdose can be fatal

Other hypernyms of amobarbital include truth drug, truth serum.

amobarbital (noun)	barbiturate (noun)
a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant	organic compound having powerful soporific effect; overdose can be fatal