Yes, STRAWBERRY is a Scrabble word!

Letter values in Scrabble US: S 1, T 1, R 1, A 1, W 4, B 3, E 1, R 1, R 1, Y 4.

Is it a valid word?

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

sweet fleshy red fruit
any of various low perennial herbs with many runners and bearing white flowers followed by edible fruits having many small achenes scattered on the surface of an enlarged red pulpy berry
a soft red birthmark

Also: strawberry mark, hemangioma simplex.