Yes, FETISHES is a Scrabble word!

Letter values in Scrabble US: F 4, E 1, T 1, I 1, S 1, H 4, E 1, S 1.

Is it a valid word?

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

a form of sexual desire in which gratification depends to an abnormal degree on some object or item of clothing or part of the body
a charm superstitiously believed to embody magical powers
excessive or irrational devotion to some activity