shrink vs wither

shrink is a noun but wither is not a noun.

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

As verbs, shrink and wither are synonyms defined as:

Other synonyms of shrink include shrivel, shrivel up.

shrink (noun)	wither (noun)
a physician who specializes in psychiatry

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