single-reed instrument vs single-reed woodwind

single-reed instrument and single-reed woodwind both are nouns.

Word	Noun	Adjective	Verb	Adverb
single-reed instrument	Yes	No	No	No
single-reed woodwind	Yes	No	No	No

As nouns, single-reed instrument and single-reed woodwind are synonyms defined as:

single-reed instrument and single-reed woodwind: a beating-reed instrument with a single reed (as a clarinet or saxophone)

single-reed instrument (noun)	single-reed woodwind (noun)
a beating-reed instrument with a single reed (as a clarinet or saxophone)	a beating-reed instrument with a single reed (as a clarinet or saxophone)