pentobarbital vs pentobarbital sodium

pentobarbital and pentobarbital sodium both are nouns.

Word	Noun	Adjective	Verb	Adverb
pentobarbital	Yes	No	No	No
pentobarbital sodium	Yes	No	No	No

As nouns, pentobarbital and pentobarbital sodium are synonyms defined as:

pentobarbital and pentobarbital sodium: a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic

Other synonyms of pentobarbital include Nembutal, yellow jacket.

pentobarbital (noun)	pentobarbital sodium (noun)
a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic	a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic