In enhancing real-time message verbosity, a computing device analyzes a prior message corpus for a sender over multiple vectors. The computing device derives the prior message model from results of the analysis of the prior message corpus. When the computing device receives new message text composed at the sender, the computing device applies a prior message model to the new message text. The prior message model representing behavior of the sender in prior message discourses with different communication device types and different message types. The computing device identifies a set of candidate texts based on the prior message model and inserts the set of candidate texts into the new message text to form modified message text. The computing device validates a readability of the modified message text and sends the modified message text to the sender device. The sender device then sends the modified message text to a recipient device.