Yes, pias is a Scrabble word!
...and is worth 6 points in Scrabble, and 7 points in Words with Friends
pias
Noun
1. Perennial herb of East Indies to Polynesia and Australia; cultivated for its large edible root yielding Otaheite arrowroot starch
What Scrabble words can I make with the letters in pias?
3 Letter Words
2 Letter Words