screw tree vs bush

screw tree and bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
screw tree	Yes	No	No	No
bush	Yes	Yes	Yes	No

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

Other hypernyms of screw tree include shrub.

screw tree (noun)	bush (noun)
a tree or shrub of the genus Helicteres	hair growing in the pubic area
	dense vegetation consisting of stunted trees or bushes
	a large wilderness area
	a low woody perennial plant usually having several major stems

screw tree (adjective)	bush (adjective)
	not of the highest quality or sophistication

screw tree (verb)	bush (verb)
	provide with a bushing