Yes, CONFUSION is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, N 1, F 4, U 1, S 1, I 1, O 1, N 1.

Is it a valid word?

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

disorder resulting from a failure to behave predictably
a mental state characterized by a lack of clear and orderly thought and behavior
a feeling of embarrassment that leaves you confused
an act causing a disorderly combination of elements with identities lost and distinctions blended
a mistake that results from taking one thing to be another

Also: mental confusion, discombobulation, mix-up.