Nut case and Sociopath

Nut case noun - A whimsically eccentric person.

Sociopath and nut case are semantically related. in crackpot topic. In some cases you can use "Sociopath" instead a noun phrase "Nut case", when it comes to topics like insane person.

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personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath').

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