ROSTIS is a playable word

rosti Scrabble® Dictionary

noun
pl. rostis
a Swiss dish of fried grated potatoes topped with cheese
48 Playable Words can be made from "ROSTIS"
   2-Letter Words (9 found)
   3-Letter Words (12 found)
   4-Letter Words (16 found)
   5-Letter Words (9 found)
   6-Letter Words (2 found)