You probably know that when you type in WP8, Word Flow makes a guess at the next word you might want to type and displays it above the keyboard. And, once you start typing displays a selection of possible words in the space above the keyboard. What you might not know is that you can swipe this bar sideways to get even more suggestions. For example try typing in admin - you get two suggestions, but now swipe and there are a considerable number more on offer!
Remember - in the smartphone world it always pays to long press and swipe everything!