Yes, OXBOWS is a Scrabble word!

Letter values in Scrabble US: O 1, X 8, B 3, O 1, W 4, S 1.

Is it a valid word?

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

the land inside an oxbow bend in a river
a U-shaped curve in a stream
a wooden framework bent in the shape of a U; its upper ends are attached to the horizontal yoke and the loop goes around the neck of an ox