Keyed in

As I work on my first instance of thumb RSI (just joking but I can see how it could happen if you spend too long too often on the tiny keypad of a mobile phone) I can't help wondering what is the longest word that can be made with a single key using predictive text. For example the 3 key has the letters d e f. So you could do feeded which I didn't think was a word but who am I to argue with the phone? Nonmom on the 6 key. Hours of fun - erredickly (or especially) if you look at 2 key combinations. Hmmm. I don't understand why some people eschew predictive text.