A computing system may predict a word based on received user input that selects a part of the word (e.g., the first characters, the first root, etc.). Specifically, a program, when run on the computing system, may perform a method including creating a candidate list of words based on received user input. These words may be then organized into a hierarchy, or tree structure, in which each word is associated with a parent and each parent is a partial match for its associated words. The top-tier partial matches may be presented, and user input corresponding to a selected partial match may be received. A set of candidates related to the selected partial match may then be presented for user selection.