Yes, SANDWORT is a Scrabble word!

Letter values in Scrabble US: S 1, A 1, N 1, D 2, W 4, O 1, R 1, T 1.

Is it a valid word?

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

loosely matted plant with moss-like foliage studded with tiny starry four-petaled white blossoms; mountains of central and southern Europe
low-growing herb having clusters of small white four-petaled flowers
low-growing chiefly perennial plant usually with small white flowers suitable for e.g. rock gardens

Also: moehringia mucosa, moehringia lateriflora.