downer vs glutethimide

downer and glutethimide both are nouns.

Word	Noun	Adjective	Verb	Adverb
downer	Yes	No	No	No
glutethimide	Yes	No	No	No

As nouns, glutethimide is a hyponym of downer; that is, glutethimide is a word with a more specific, narrower meaning than downer:

downer: a drug that reduces excitability and calms a person
glutethimide: sedative (trade name Doriden) used to treat some sleep disorders

Other hyponyms of downer include chloral hydrate, Doriden, sedative-hypnotic, sedative-hypnotic drug.

downer (noun)	glutethimide (noun)
a drug that reduces excitability and calms a person	sedative (trade name Doriden) used to treat some sleep disorders