wither vs atrophy

wither is not a noun while atrophy is a noun.

Word	Noun	Adjective	Verb	Adverb
wither	No	No	Yes	No
atrophy	Yes	No	Yes	No

As verbs, atrophy is a hyponym of wither; that is, atrophy is a word with a more specific, narrower meaning than wither:

Other hyponyms of wither include blast, die back, die down, dry up, mummify.

wither (noun)	atrophy (noun)
	any weakening or degeneration (especially through lack of use)
	a decrease in size of an organ caused by disease or disuse

wither (verb)	atrophy (verb)
wither, as with a loss of moisture	undergo atrophy
lose freshness, vigor, or vitality