purging vs abreaction

purging and abreaction both are nouns.

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

As nouns, abreaction is a hyponym of purging; that is, abreaction is a word with a more specific, narrower meaning than purging:

purging: an act of removing by cleansing; ridding of sediment or other undesired elements
abreaction: (psychoanalysis) purging of emotional tensions

Other hyponyms of purging include catharsis, katharsis, catharsis, katharsis, purgation.

purging (noun)	abreaction (noun)
an act of removing by cleansing; ridding of sediment or other undesired elements	(psychoanalysis) purging of emotional tensions
the act of clearing yourself (or another) from some stigma or charge

purging (adjective)	abreaction (adjective)
serving to purge or rid of sin