atrophy vs withering

atrophy and withering both are nouns.

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

As nouns, atrophy and withering are synonyms defined as:

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

atrophy (noun)	withering (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

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

atrophy (verb)	withering (verb)
undergo atrophy