Yes, BACCARATS is a Scrabble word!

Letter values in Scrabble US: B 3, A 1, C 3, C 3, A 1, R 1, A 1, T 1, S 1.

Is it a valid word?

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

a card game played in casinos in which two or more punters gamble against the banker; the player wins who holds 2 or 3 cards that total closest to nine

Also: chemin de fer.