wood vs reed instrument

wood and reed instrument both are nouns.

Word	Noun	Adjective	Verb	Adverb
wood	Yes	No	No	No
reed instrument	Yes	No	No	No

As nouns, reed instrument is a hyponym of wood; that is, reed instrument is a word with a more specific, narrower meaning than wood:

wood: any wind instrument other than the brass instruments
reed instrument: a musical instrument that sounds by means of a vibrating reed

Other hyponyms of wood include beating-reed instrument, reed, flute, transverse flute.

wood (noun)	reed instrument (noun)
any wind instrument other than the brass instruments	a musical instrument that sounds by means of a vibrating reed
a golf club with a long shaft used to hit long shots; originally made with a wooden head
the trees and other plants in a large densely wooded area
the hard fibrous lignified substance under the bark of trees