A method and communication device are provided for database augmentation using linguistic data stored on a device, and utilizing a database stored on a device to perform multi-word substitution. A database may be augmented by monitoring other databases that contain linguistic data, such as contact databases containing linguistic data regarding entities that a device may communicate with, and updating the database with linguistic data in the other databases. The linguistic data in the augmented database may be compared with words received from an input apparatus to determine whether any of the received words should be replaced with linguistic data from the augmented database. The augmented database may contain one word entries and multi-word entries to allow for multi-word substitution.