|I seem to remember that once you ignored a word it remained ignored at all times. |
In my 2007 Word, that is only true for the current session.
When you close and reopen Spell Check runs again.
There is an option to Hide Spelling and Grammar errors by document.
In my 2007
In Options, under Proofing, down at the bottom are two check boxes.
Not sure if 2013 is the same.