shrink vs atrophy

shrink and atrophy both are nouns.

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

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

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

shrink (noun)	atrophy (noun)
a physician who specializes in psychiatry	any weakening or degeneration (especially through lack of use)
	a decrease in size of an organ caused by disease or disuse

shrink (verb)	atrophy (verb)
become smaller or draw together	undergo atrophy
reduce in size; reduce physically
wither, as with a loss of moisture
decrease in size, range, or extent
draw back, as with fear or pain