Method and system speeding up data input to a communication system

User equipment and/or devices equipped to engage in textual communication sessions also interface to a server. The server maintains a thesaurus bank that includes a variety of different thesauri. When engaging in a textual communication or editing session, the user or the user equipment can request or may automatically receive a relevant thesaurus. As the user enters characters to create a textual entry, the selected thesaurus is searched to identify candidate completions. The user can then select one of several displayed candidate completions. In addition, the user input can also be delivered to the server and used to update the content of the thesauri.