Cathartic: (ca·thar·tic) adj. emotionally purging

Screaming at the top of one's lungs can be surprisingly cathartic.

Caustic: (kaw-stik) adj. Severely critical or sarcastic

Molly's caustic comments have lost her many friendships.

Mitigate: (mit-i-geyt) v. to lessen in intensity

Melissa's parent's mitigated her punishment when she paid for the broken window.

Chronicle: () v. A record in history

Oona likes to chronicle her life through scrapbooking. 

Dogmatic: (dawg-mat-ik) adj. Asserting opinions in an arrogant manner

Terry's dogmatic political speeches turned some supporters against him.