Headcase and Sociopath

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

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personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath').

Headcase and sociopath are semantically related. You can use "Headcase" instead a noun "Sociopath".