beating-reed instrument vs reed instrument

beating-reed instrument and reed instrument both are nouns.

Word	Noun	Adjective	Verb	Adverb
beating-reed instrument	Yes	No	No	No
reed instrument	Yes	No	No	No

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

beating-reed instrument and reed instrument: a musical instrument that sounds by means of a vibrating reed

Other synonyms of beating-reed instrument include reed.

beating-reed instrument (noun)	reed instrument (noun)
a musical instrument that sounds by means of a vibrating reed	a musical instrument that sounds by means of a vibrating reed