Perhaps a useful Note to Self for later -- how to mess with your cross-application dictionary on OS X.

Macworld: Mac 911: Editing OS X's spell checking dictionary:

If by "synchronize" you mean replacing a puny spell checking dictionary on one Mac with the more robust dictionary from another Mac, here's the way: Travel to ~/Library/Spelling and copy the en file to the same location on another Mac, replacing the en file on that Mac.

More on editing in a text editor later, but not rocket science.