fault

noun

1
a wrong action attributable to bad judgment or ignorance or inattention
he made a bad mistake
she was quick to point out my errors
2
(sports) a serve that is illegal (e.g., that lands outside the prescribed area)
he served too many double faults
3
responsibility for a bad situation or event
it was John's fault
4
the quality of being inadequate or falling short of perfection
they discussed the merits and demerits of her novel
he knew his own faults much better than she did
5
(electronics) equipment failure attributable to some defect in a circuit (loose connection or insulation failure or short circuit etc.)
it took much longer to find the fault than to fix it
6
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
they built it right over a geological fault
he studied the faulting of the earth's crust
7
an imperfection in an object or machine
a flaw caused the crystal to shatter
if there are any defects you should send it back to the manufacturer

Also useful for “fault”:Wordle Solver— Five letters — perfect Wordle material