blunder, lapse

FUMBLE
WordClue
BADerror, fault
GOOFblunder, blooper
SLIPlapse, fault
ERRORlapse, blunder
FAULTlapse, mistake
FLUFFlapse, thinko
GAFFElapse, fluff
LAPSEblunder, gaffe
DEFECTlapse, error
THINKOlapse, slip
BLOOPERblunder, error
BLUNDERlapse, gaffe
MISTAKElapse, blunder
STUMBLElapse, defect
WRENGTHerror
CORRECTNESSfreedom from error
MISTAKEblunder, goof
GAFFEblunder, mistake