Yes, PURGATORIES is a Scrabble word!

Letter values in Scrabble US: P 3, U 1, R 1, G 2, A 1, T 1, O 1, R 1, I 1, E 1, S 1.

Is it a valid word?

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

a temporary condition of torment or suffering
(theology) in Roman Catholic theology the place where those who have died in a state of grace undergo limited torment to expiate their sins