There are numerous ways to describe someone who accepts a challenge. One may say they are brave, courageous, fearless, or daring. They could also be described as bold, audacious, intrepid, or valiant. The person may be considered gutsy, plucky, or resolute for taking on a challenge with determination and resolve. They could also be seen as strong-minded or adventurous for their willingness to try something new or difficult. A few other alternatives for describing someone who accepts a challenge may be adventurous, gritty, determined, or undaunted. Whatever term is used, taking on a challenge requires a spirit of confidence and bravery.