PLANK is a playable word

plank Scrabble® Dictionary

verb
planked, planking, planks
to cover with planks (long, flat pieces of lumber)
16 Playable Words can be made from "PLANK"
   2-Letter Words (6 found)
   3-Letter Words (6 found)
   4-Letter Words (3 found)
   5-Letter Words (1 found)