Synonyms for the term "unstructured lacking-definite-structure" can help enhance our vocabulary and add depth to our communication. When referring to something that lacks definite structure, we can use terms like "formless," "amorphous," or "disorganized." These synonyms portray a sense of shapelessness or a lack of distinct arrangement. Additionally, words such as "chaotic," "unordered," or "unsystematic" can capture the state of something that lacks structure or organization. By incorporating these synonyms into our language, we can express this concept more precisely and effectively, enabling better clarity and understanding in our discussions and written expressions.