Taking a look at IBM Lotus Symphony Documents

In addition to fixing common typos, the Instant Corrections tool will automatically compile lists of words you frequently type and store them in the Word Completion list. Later, when Instant Corrections recognizes that you're typing a word that appears in the Word Completion list, it will automatically complete the word for you. This works like Word's AutoText/AutoComplete feature, except that you don't have to manually add your commonly used words to the list.