boxwood vs bush

boxwood and bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
boxwood	Yes	No	No	No
bush	Yes	Yes	Yes	No

As nouns, bush is a hypernym of boxwood; that is, bush is a word with a broader meaning than boxwood:

Other hypernyms of boxwood include shrub.

boxwood (noun)	bush (noun)
evergreen shrubs or small trees	hair growing in the pubic area
very hard tough close-grained light yellow wood of the box (particularly the common box); used in delicate woodwork: musical instruments and inlays and engraving blocks	dense vegetation consisting of stunted trees or bushes
	a large wilderness area
	a low woody perennial plant usually having several major stems

boxwood (adjective)	bush (adjective)
	not of the highest quality or sophistication

boxwood (verb)	bush (verb)
	provide with a bushing