Synonyms for the phrase "owned up to" include admitting, confessing, acknowledging, conceding, revealing, disclosing, and coming clean. These words all suggest taking responsibility for something that has been done wrong or confessing to a mistake or wrongdoing. Other similar phrases include "fessing up," "taking the blame," or "accepting responsibility." These words and phrases are all essential for maintaining good relationships and trust with others. Being honest and open about our mistakes can help to build stronger connections and avoid further conflict or misunderstandings. So, if you've done something wrong, it's always better to own up to it than to pretend it never happened.