There are several synonyms for the phrase "accepted defeated" such as resigned, surrendered, admitted defeat, and submitted. Resigned means giving in to a situation without resistance. Surrendered means giving up completely and often implies submission to a more powerful force. Admitted defeat suggests taking responsibility for one's failure or loss. Submitted means succumbing to a certain condition or authority. All of these words indicate a willingness to acknowledge one's inability to succeed at something and acknowledge the superiority of another party. In certain situations, these words may be used interchangeably, depending on the context.