Synonyms of 'own up'
▷ See own
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Two-thirds of them admit to buying drink illegally.
If someone confesses to doing something wrong, they admit that they did it.
He has confessed to seventeen murders.
She confesses that she only wrote those books for the money.
Thesaurus for own up from the Collins English Thesaurus
If you own up to something wrong that you have done , you admit that you did it.