Librium vs benzodiazepine

Librium and benzodiazepine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Librium	Yes	No	No	No
benzodiazepine	Yes	No	No	No

As nouns, benzodiazepine is a hypernym of Librium; that is, benzodiazepine is a word with a broader meaning than Librium:

Librium: a tranquilizer (trade names Librium and Libritabs) used in the treatment of alcoholism
benzodiazepine: any of several similar lipophilic amines used as tranquilizers or sedatives or hypnotics or muscle relaxants; chronic use can lead to dependency

Librium (noun)	benzodiazepine (noun)
a tranquilizer (trade names Librium and Libritabs) used in the treatment of alcoholism	any of several similar lipophilic amines used as tranquilizers or sedatives or hypnotics or muscle relaxants; chronic use can lead to dependency