1. A method for adjustment of temporal acoustical characteristics of words in an item structure, the method comprising: receiving the item structure comprising at least a first item, the first item representing a first set of one or more words; extracting one or more keywords from the first set to generate a first keyword item, the one or more keywords being selected to distinguish the keyword item from other items; abbreviating the keyword item by generating a first alternative representation for the first keyword item to create a first abbreviated item; and storing the first abbreviated item.