barbital vs barbiturate

barbital and barbiturate both are nouns.

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

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

barbital: a barbiturate used as a hypnotic
barbiturate: organic compound having powerful soporific effect; overdose can be fatal

barbital (noun)	barbiturate (noun)
a barbiturate used as a hypnotic	organic compound having powerful soporific effect; overdose can be fatal