diethylbarbituric acid vs barbital

diethylbarbituric acid and barbital both are nouns.

Word	Noun	Adjective	Verb	Adverb
diethylbarbituric acid	Yes	No	No	No
barbital	Yes	No	No	No

As nouns, diethylbarbituric acid and barbital are synonyms defined as:

Other synonyms of diethylbarbituric acid include barbitone, diethylmalonylurea, veronal.

diethylbarbituric acid (noun)	barbital (noun)
a barbiturate used as a hypnotic	a barbiturate used as a hypnotic