clarinet vs basset horn

clarinet and basset horn both are nouns.

Word	Noun	Adjective	Verb	Adverb
clarinet	Yes	No	No	No
basset horn	Yes	No	No	No

As nouns, basset horn is a hyponym of clarinet; that is, basset horn is a word with a more specific, narrower meaning than clarinet:

clarinet: a single-reed instrument with a straight tube
basset horn: a tenor clarinet; pitched in the key of F below the B-flat clarinet

Other hyponyms of clarinet include bass clarinet, B-flat clarinet, licorice stick.

clarinet (noun)	basset horn (noun)
a single-reed instrument with a straight tube	a tenor clarinet; pitched in the key of F below the B-flat clarinet