It used to be that if I were to type a new word, like
Androidenthusiast, it would suggest other words. I wouldn't select any, press space, backspace, and then it was there as a suggestion. If I clicked on it, it would say "Click again to save", and so I did and so it did. But as of late, it has stopped doing that.
I can't find the settings in
Language / input >
Keyboards anywhere. Can't remember when its behaviour changed. Nexus 5, running Android 5.1.