contrabassoon vs bassoon

contrabassoon and bassoon both are nouns.

Word	Noun	Adjective	Verb	Adverb
contrabassoon	Yes	No	No	No
bassoon	Yes	No	No	No

As nouns, bassoon is a hypernym of contrabassoon; that is, bassoon is a word with a broader meaning than contrabassoon:

contrabassoon: the bassoon that is the largest instrument in the oboe family
bassoon: a double-reed instrument; the tenor of the oboe family

contrabassoon (noun)	bassoon (noun)
the bassoon that is the largest instrument in the oboe family	a double-reed instrument; the tenor of the oboe family