shrink vs retract

shrink is a noun but retract is not a noun.

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

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

Other hyponyms of shrink include shrink back.

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

shrink (verb)	retract (verb)
become smaller or draw together	formally reject or disavow a formerly held belief, usually under pressure
reduce in size; reduce physically	pull inward or towards a center
wither, as with a loss of moisture	use a surgical instrument to hold open (the edges of a wound or an organ)
decrease in size, range, or extent	pull away from a source of disgust or fear
draw back, as with fear or pain