Yes, AHIMSAS is a Scrabble word!

Letter values in Scrabble US: A 1, H 4, I 1, M 3, S 1, A 1, S 1.

Is it a valid word?

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

a Buddhist and Hindu and especially Jainist doctrine holding that all forms of life are sacred and urging the avoidance of violence