Yes, SABINES is a Scrabble word!

Letter values in Scrabble US: S 1, A 1, B 3, I 1, N 1, E 1, S 1.

Is it a valid word?

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

a river in eastern Texas that flows south into the Gulf of Mexico
a member of an ancient Oscan-speaking people of the central Apennines north of Rome who were conquered and assimilated into the Roman state in 290 BC

Also: sabine river.