Yes, BULLFIGHTS is a Scrabble word!

Letter values in Scrabble US: B 3, U 1, L 1, L 1, F 4, I 1, G 2, H 4, T 1, S 1.

Is it a valid word?

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

a Spanish or Portuguese or Latin American spectacle; a matador baits and (usually) kills a bull in an arena before many spectators