shrink vs dry up

shrink is a noun but dry up is not a noun.

Word	Noun	Adjective	Verb	Adverb
shrink	Yes	No	Yes	No
dry up	No	No	Yes	No

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

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

shrink (noun)	dry up (noun)
a physician who specializes in psychiatry

shrink (verb)	dry up (verb)
become smaller or draw together	lose water or moisture
reduce in size; reduce physically	dry up and shrivel due to complete loss of moisture
wither, as with a loss of moisture
decrease in size, range, or extent
draw back, as with fear or pain