sodium thiopental vs phenobarbital

sodium thiopental and phenobarbital both are nouns.

Word	Noun	Adjective	Verb	Adverb
sodium thiopental	Yes	No	No	No
phenobarbital	Yes	No	No	No

As nouns, sodium thiopental and phenobarbital are synonyms defined as:

sodium thiopental and phenobarbital: a long-acting barbiturate used as a sedative

Other synonyms of sodium thiopental include Luminal, phenobarbitone, purple heart.

sodium thiopental (noun)	phenobarbital (noun)
a long-acting barbiturate used as a sedative	a long-acting barbiturate used as a sedative