withering vs atrophy

withering and atrophy both are nouns.

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

As nouns, withering and atrophy are synonyms defined as:

withering and atrophy: any weakening or degeneration (especially through lack of use)

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

withering (adjective)	atrophy (adjective)
wreaking or capable of wreaking complete destruction
making light of

withering (verb)	atrophy (verb)
	undergo atrophy