Yes, ROSEWOODS is a Scrabble word!

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

Is it a valid word?

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

hard dark reddish wood of a rosewood tree having a strongly marked grain; used in cabinetwork
any of those hardwood trees of the genus Dalbergia that yield rosewood--valuable cabinet woods of a dark red or purplish color streaked and variegated with black

Also: rosewood tree.