Mine were berefit and segue.
This post just sent me to my dictionary to confirm that "berefit" is not a real word. Funnny real-life example of the problem, though!
I also usually visualize in order to spell. I have many words "tagged" in my brain by their number of letters, too.
Berefit is not a real word until such time as I see fit to poof it into existence through my will.
So, perhaps such a letter combination should be called a "pending word" rather than "not real", as I have the option to create it ex nihilo.
Granted, prior to today, I was unaware of it's non-existence, so it would have not occurred to me to create it.
So, merely by asserting that a word does not yet exist is a simple way to bring that word closer to being a real word.
Kind of like Pinocchio and the Blue Fairy, I suppose.