THUMBKIN is a playable word

thumbkin Scrabble® Dictionary

noun
pl. thumbkins
a screw that is turned by the thumb and fingers
65 Playable Words can be made from "THUMBKIN"
   2-Letter Words (14 found)
   3-Letter Words (31 found)
   4-Letter Words (14 found)
   5-Letter Words (3 found)
   6-Letter Words (2 found)
   8-Letter Words (1 found)