diethylbarbituric acid vs barbitone

diethylbarbituric acid and barbitone both are nouns.

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

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

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

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