The word "un-arranged" is often used to describe something that lacks organization or structure. Some synonyms for un-arranged include disorderly, chaotic, haphazard, disorganized, messy, and unplanned. These words indicate a lack of order or direction, with a sense of randomness or unpredictability. Unstructured and unorchestrated summarize the absence of a coherent plan or system. Irregular and erratic suggest a pattern or behavior that is inconsistent or unpredictable. All of these words can be useful when describing situations or environments that lack structure or organization, whether it's a messy room or a disorganized workplace.