katharsis vs abreaction

katharsis and abreaction both are nouns.

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

As nouns, katharsis and abreaction are synonyms defined as:

katharsis and abreaction: (psychoanalysis) purging of emotional tensions

Other synonyms of katharsis include catharsis.

katharsis (noun)	abreaction (noun)
(psychoanalysis) purging of emotional tensions	(psychoanalysis) purging of emotional tensions
purging the body by the use of a cathartic to stimulate evacuation of the bowels