Meaning : A flaw or weak point.
Example :
He was quick to point out his wife's failings.
Synonyms : weakness
Meaning : Failure to reach a minimum required performance.
Example :
His failing the course led to his disqualification.
He got two flunks on his report.
Synonyms : flunk
Success in satisfying a test or requirement.
His future depended on his passing that test.