Yes, FAVISM is a Scrabble word!

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

Is it a valid word?

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

anemia resulting from eating fava beans; victims have an inherited blood abnormality and enzyme deficiency