defect, stain

RED
WordClue
BUGdefect, blemish
FLAWdefect, red
SOREdefect, scrab
FAULTdefect, bug
LAPSEdefect, error
SMEARstain, smudge
STAINdefect, damage
DEFECTstain, damage
SMUDGEstain, smear
BLEMISHdefect, flaw
FAILINGdefect
STUMBLElapse, defect
DRAWBACKdefect, rebate
DETRIMENTdrawback, defect
DISLOCATIONdefect in crystal
SOREdefect, scrab
CUSTODYdefence, protection