Nembutal vs barbiturate

Nembutal and barbiturate both are nouns.

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

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

Nembutal: a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic
barbiturate: organic compound having powerful soporific effect; overdose can be fatal

Nembutal (noun)	barbiturate (noun)
a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic	organic compound having powerful soporific effect; overdose can be fatal