Yes, SOCIOPATH is a Scrabble word!

Letter values in Scrabble US: S 1, O 1, C 3, I 1, O 1, P 3, A 1, T 1, H 4.

Is it a valid word?

SOCIOPATH is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

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personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath')