psychiatrist vs head-shrinker

psychiatrist and head-shrinker both are nouns.

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

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

psychiatrist and head-shrinker: a physician who specializes in psychiatry

Other synonyms of psychiatrist include shrink.

psychiatrist (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