Yes, OSCITANCY is a Scrabble word!

Letter values in Scrabble US: O 1, S 1, C 3, I 1, T 1, A 1, N 1, C 3, Y 4.

Is it a valid word?

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

drowsiness and dullness manifested by yawning
an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom