The phrase "said one piece" can be substituted with various synonyms to avoid repetition in writing. Words like "remarked," "noted," "commented," "stated," "asserted," and "declared" can be used to replace the phrase. Other potential options include "voiced," "expressed," "announced," "pronounced," "affirmed," and "avouched." By utilizing diverse vocabulary, writers can keep their text engaging and avoid monotony. It's essential to consider the context and tone when choosing the most appropriate synonym for the phrase "said one piece." The goal is to enhance the text's readability and provide a more descriptive and engaging sentence.