bush vs bushy

bush is a noun but bushy is not a noun.

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

bush (noun)	bushy (noun)
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

bush (adjective)	bushy (adjective)
not of the highest quality or sophistication	resembling a bush in being thickly branched and spreading
	used of hair; thick and poorly groomed

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