Bonhoeffer is a proper noun and the name of an important theologian and martyr, Dietrich Bonhoeffer. Therefore, there are no synonyms for this name. However, one could substitute it with other words to describe aspects of Bonhoeffer's life or work, such as "theologian," "martyr," "anti-Nazi resistance fighter," "pastor," or "writer." These words help to convey different aspects of Bonhoeffer's identity and contributions to theology and society. Despite his relatively short life span, Bonhoeffer left an indelible mark on Christian ethics and theology, making his name increasingly recognized around the world.