Yes, REVEALS is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, V 4, E 1, A 1, L 1, S 1.

Is it a valid word?

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

make visible
make known to the public information that was previously known only to a few people or that was meant to be kept a secret
disclose directly or through prophets

Also: bring out, let on, give away, let out.