Yes, PANDANUS is a Scrabble word!

Letter values in Scrabble US: P 3, A 1, N 1, D 2, A 1, N 1, U 1, S 1.

Is it a valid word?

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

fiber from leaves of the pandanus tree; used for woven articles (such as mats)
any of various Old World tropical palmlike trees having huge prop roots and edible conelike fruits and leaves like pineapple leaves

Also: screw pine.