THUMBNUT is a playable word

thumbnut Scrabble® Dictionary

noun
pl. thumbnuts
a nut that is turned by the thumb and fingers
33 Playable Words can be made from "THUMBNUT"
   2-Letter Words (7 found)
   3-Letter Words (16 found)
   4-Letter Words (7 found)
   5-Letter Words (2 found)
   8-Letter Words (1 found)