KERNEL is a playable word

kernel Scrabble® Dictionary

verb
kerneled, kerneling, kernels or kernelled, kernelling, kernels
to envelop as a kernel (the inner part of a nut)
29 Playable Words can be made from "KERNEL"
   2-Letter Words (5 found)
   3-Letter Words (11 found)
   4-Letter Words (10 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)