Haha. I guess I mean I haven't really tried to force it up yet.
OK I figured it out.
Type "jesr" or some other nonsense word and then hold your finger on it. Then choose Select. Then choose Replace... and suggestions will pop up.
Neat.
But if I'm typing a word I should know what word I really want and how to spell it. If I think I am spelling it right but am not then I'm not likely to look for a replacement.