Seconal vs barbiturate

Seconal and barbiturate both are nouns.

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

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

Seconal: barbiturate that is a white odorless slightly bitter powder (trade name Seconal) used as a sodium salt for sedation and to treat convulsions
barbiturate: organic compound having powerful soporific effect; overdose can be fatal

Seconal (noun)	barbiturate (noun)
barbiturate that is a white odorless slightly bitter powder (trade name Seconal) used as a sodium salt for sedation and to treat convulsions	organic compound having powerful soporific effect; overdose can be fatal