FLUNKS is a playable word

flunk Scrabble® Dictionary

verb
flunked, flunking, flunks
to fail an examination or course
22 Playable Words can be made from "FLUNKS"
   2-Letter Words (3 found)
   3-Letter Words (7 found)
   4-Letter Words (7 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)