SLIPUP is a playable word

slipup Scrabble® Dictionary

noun
pl. slipups
a mistake
33 Playable Words can be made from "SLIPUP"
   2-Letter Words (6 found)
   3-Letter Words (12 found)
   4-Letter Words (9 found)
   5-Letter Words (4 found)
   6-Letter Words (2 found)