The phrase 'of piece' refers to something that is complete or whole. Synonyms for this phrase include 'intact', 'unbroken', 'undamaged', 'unharmed', 'unimpaired', 'perfect', 'unspoiled', and 'unscathed'. These words can be used to describe physical objects, such as a vase or mirror, as well as abstract concepts, such as a relationship or reputation. It is important to note that these synonyms do not always have the exact same meaning as 'of piece', but they can be used in similar contexts. Using a variety of synonyms can add depth and nuance to one's writing or conversation.