Yes, RASPBERRIES is a Scrabble word!

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

Is it a valid word?

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

woody brambles bearing usually red but sometimes black or yellow fruits that separate from the receptacle when ripe and are rounder and smaller than blackberries
red or black edible aggregate berries usually smaller than the related blackberries
a cry or noise made to express displeasure or contempt

Also: raspberry bush, bronx cheer.