Yes, PELLITORY is a Scrabble word!

Letter values in Scrabble US: P 3, E 1, L 1, L 1, I 1, T 1, O 1, R 1, Y 4.

Is it a valid word?

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

herb that grows in crevices having long narrow leaves and small pink apetalous flowers
a small Mediterranean plant containing a volatile oil once used to relieve toothache

Also: pellitory-of-the-wall, wall pellitory, parietaria difussa, pellitory-of-spain, anacyclus pyrethrum.