Yes, STARWORT is a Scrabble word!

Letter values in Scrabble US: S 1, T 1, A 1, R 1, W 4, O 1, R 1, T 1.

Is it a valid word?

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

low-growing north temperate herb having small white star-shaped flowers; named for its alleged ability to ease sharp pains in the side

Also: greater stitchwort, stellaria holostea.