NONSTOP is a playable word

nonstop Scrabble® Dictionary

noun
pl. nonstops
a flight without a stop en route
56 Playable Words can be made from "NONSTOP"
   2-Letter Words (7 found)
   3-Letter Words (18 found)
   5-Letter Words (8 found)
   6-Letter Words (1 found)
   7-Letter Words (2 found)