Sociopath and Wacko

Sociopath noun - Someone with a sociopathic personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath').

Wacko and sociopath are semantically related. In some cases you can use "Wacko" instead a noun "Sociopath".

Wacko noun - A person judged to be legally or medically insane.

Sociopath and wacko are semantically related. Sometimes you can use "Sociopath" instead a noun "Wacko".