1) Careorneglect 1) Blunder 2) Error 3) Faux pas 4) Inadvertence 5) Lapse 6) Omission 7) Omission or mistake 8) Slip 9) Slang for a mistake 10) Supervision 11) Unconscious neglect 12) Unintentional omission 1) Error 2) Inadvertence 3) Inattention 4) Invigilation 5) Lapse 6) Miss 7) Neglect 8) Superintendence 9) Superintendency 10) Supervising 11) Supervision 
• (n.) Escape from an overlooked peril. • (n.) Watchful care; superintendence; general supervision. • (n.) An overlooking; an omission; an error.
O'ver·sight` noun 1. Watchful care; superintendence; general supervision. 2. An overlooking; an omission; an error. Hooker. 3. Escape from an overlooked peril. [ R.] 'His fool-happy oversight .' Spenser. Syn. -- Superintendence; supervision; ins...
Oversight is slang for a mistake.
[n] - an unintentional omission resulting from failure to notice something 2. [n] - a mistake resulting from inattention
lapse noun a mistake resulting from inattention
an omission or error due to carelessness: My bank statement is full of oversights. · unintentional failure to notice or consider; lack of proper attention: Owing to my oversight, the letter was sent unsigned. · supervision; watchful care: a person responsible for the oversight of the organization.
[SAT terms] management by watching and directing a person or group an unintentional omission from failure to notice something