Yes, BABASSU is a Scrabble word!

Letter values in Scrabble US: B 3, A 1, B 3, A 1, S 1, S 1, U 1.

Is it a valid word?

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

tall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivory

Also: babassu palm, coco de macao, orbignya phalerata, orbignya spesiosa, orbignya martiana.