Yes, BENZOIN is a Scrabble word!

Letter values in Scrabble US: B 3, E 1, N 1, Z 10, O 1, I 1, N 1.

Is it a valid word?

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

gum resin used especially in treating skin irritation
used in some classifications for the American spicebush and certain other plants often included in the genus Lindera

Also: gum benzoin, gum benjamin, asa dulcis, genus benzoin.