katharsis vs purgation

katharsis and purgation both are nouns.

Word	Noun	Adjective	Verb	Adverb
katharsis	Yes	No	No	No
purgation	Yes	No	No	No

As nouns, katharsis and purgation are synonyms defined as:

katharsis and purgation: purging the body by the use of a cathartic to stimulate evacuation of the bowels

Other synonyms of katharsis include catharsis.

katharsis (noun)	purgation (noun)
(psychoanalysis) purging of emotional tensions	purging the body by the use of a cathartic to stimulate evacuation of the bowels
purging the body by the use of a cathartic to stimulate evacuation of the bowels	the act of clearing yourself (or another) from some stigma or charge
	a ceremonial cleansing from defilement or uncleanness by the performance of appropriate rites