Yes, CAMOS is a Scrabble word!

Letter values in Scrabble US: C 3, A 1, M 3, O 1, S 1.

Is it a valid word?

CAMOS is a valid word in the official Scrabble dictionary (US) and the UK Scrabble Dictionary, but not in Words with Friends (ENABLE).

fabric dyed with splotches of green and brown and black and tan; intended to make the wearer of a garment made of this fabric hard to distinguish from the background