The definition of confess is to admit wrongdoings or to make something known.
To accept (someone) as an inpatient in a hospital.
admit or acknowledge a wrongdoing or error
Fess up is defined as to confess to something, take responsibility for something or tell the truth about something.
Find another word for own-up. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for own-up, like: be honest, admit error, confess, admit, make a clean breast of and fess up.