inaccuracy, erratum, fault, oversight.
Mistake, blunder, error, slip refer to deviations from right, accuracy, correctness, or truth.
A mistake, grave ortrivial, is caused by bad judgment or a disregard of rule or principle:
It was a mistake to argue.
A blunder is a careless, stupid, or gross mistake in action or speech, suggesting awkwardness, heedlessness, or ignorance:
Through his blunder the message was lost.
An error (often interchanged with mistake) is an unintentional wandering or deviation from accuracy, or right conduct: an error in addition.
A slip is usually a minor mistake made through haste or carelessness:
a slip of the tongue.