Yes, PSYCHOPATH is a Scrabble word!

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

Is it a valid word?

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personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath')