Catharsis

Noun

 * 1)  A release of emotional tension after an overwhelming vicarious experience, resulting in the purging or purification of the emotions, as through watching a dramatic production (especially a tragedy).  Coined in this sense by Aristotle.
 * Seeing the hero's catharsis helped her deal with the loss of her parents.
 * 1) Any release of emotional tension to the same effect, more widely.
 * 2) A purification or cleansing, especially emotional.
 * 3)  A therapeutic technique to relieve tension.
 * 4)  Purging of the digestive system.

Synonyms for Catharsis
purge, purification, cleansing.

Thesaurus
BM, abreaction, abstersion, acting-out, bloody flux, bowdlerization, bowel movement, cleaning, cleansing, crap, defecation, dejection, deliverance, detersion, diarrhea, discharge, dry cleaning, dysentery, emotional release, evacuation, expurgation, flux, freeing, intermission, lientery, loose bowels, lustration, motor abreaction, movement, outlet, psychocatharsis, psychodrama, purgation, purge, purging, purification, release, release therapy, removal, reprieve, respite, runs, shit, shits, steam cleaning, stool, surcease, suspension, trots, turistas, voidance

Etymology
From κάθαρσις: from καθαίρω: