To the left of the suggested words there is a '+' that allows you to add a word. As far as editing I think starting over is the only way (in settings somewhere is a reset), I don't know of a way to remove a single word.
go to settings and reset the dictionary. I don't know how to manually remove the wrong words can do that in ms. word but on the phone. It migt be in lice.com or outlook .com settings.