Yes, VOODOO is a Scrabble word!

Letter values in Scrabble US: V 4, O 1, O 1, D 2, O 1, O 1.

Is it a valid word?

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

a charm superstitiously believed to embody magical powers
(Haiti) followers of a religion that involves witchcraft and animistic deities
a religious cult practiced chiefly in Caribbean countries (especially Haiti); involves witchcraft and animistic deities