Yes, AUTISMS is a Scrabble word!

Letter values in Scrabble US: A 1, U 1, T 1, I 1, S 1, M 3, S 1.

Is it a valid word?

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

(psychiatry) an abnormal absorption with the self; marked by communication disorders and short attention span and inability to treat others as people