Yes, SHIPWAYS is a Scrabble word!

Letter values in Scrabble US: S 1, H 4, I 1, P 3, W 4, A 1, Y 4, S 1.

Is it a valid word?

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

structure consisting of a sloping way down to the water from the place where ships are built or repaired
a canal large enough for seagoing vessels

Also: ship canal.