Yes, PILEWORT is a Scrabble word!

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

Is it a valid word?

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

perennial herb native to Europe but naturalized elsewhere having heart-shaped leaves and yellow flowers resembling buttercups; its tuberous roots have been used as a poultice to relieve piles

Also: lesser celandine, ranunculus ficaria.