shrink vs head-shrinker

shrink and head-shrinker both are nouns.

Word	Noun	Adjective	Verb	Adverb
shrink	Yes	No	Yes	No
head-shrinker	Yes	No	No	No

As nouns, shrink and head-shrinker are synonyms defined as:

Other synonyms of shrink include psychiatrist.

shrink (noun)	head-shrinker (noun)
a physician who specializes in psychiatry	a savage who cuts off and preserves the heads of enemies as trophies
	a physician who specializes in psychiatry

shrink (verb)	head-shrinker (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