shrinkage vs shrink

shrinkage and shrink both are nouns.

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

shrinkage (noun)	shrink (noun)
the act of stealing goods that are on display in a store	a physician who specializes in psychiatry
the amount by which something shrinks
process or result of becoming less or smaller

shrinkage (verb)	shrink (verb)
	become smaller or draw together
	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