Psychopath vs. Sociopath [closed]
In popular usage, psycho or psychopath means one who has fits of uncontrollable violent rage, or enjoys killing, or enjoys inflicting violence and suffering. The adjective psychotic (as in psychotic rage) is also used.
A sociopath can also be brutal when occasion demands, but is more noted for being cold, manipulative, cunning and utterly devoid of human empathy. The archetypical sociopath is Hannibal Lecter in the movie Silence of the Lambs.