When it comes to expressing a well-organized and logical thought or idea, the word "coherent" might come to mind. However, there are various synonyms that can be used to describe coherency in a different and more descriptive way. For instance, "consistent," "connected," and "logical" can be used to evoke the idea of something that is structured and flows well. Another great synonym for "coherent" is "intelligible," which suggests that the message or idea is clear and easily understandable. In the same vein, "lucid" can also be used to suggest a clear and easy-to-understand message or thought.