CHECKBOX is a playable word

checkbox Scrabble® Dictionary

noun
pl. checkboxes
a small box on a computer screen to be clicked on to select a feature
39 Playable Words can be made from "CHECKBOX"
   2-Letter Words (10 found)
   3-Letter Words (12 found)
   4-Letter Words (11 found)
   5-Letter Words (5 found)
   8-Letter Words (1 found)