As per this review:
And the AutoCorrect features have disappeared from the menu you get when you right-click a spelling mistake; you have to go all the way into Word's huge Options dialog to add corrections you want to use.
Sounds like a stupid change, but the only 'solution' seems to be going into options to specify an AutoCorrect substitution / exception manually:
- Click the File tab.
- Click Options.
- Click Proofing (if you are using Outlook, click Mail, and then click Editor Options).
- Click AutoCorrect Options.
For exceptions:
- On the AutoCorrect tab, click Exceptions, and then click the Other corrections tab.
- Type the misspelled word in the Don't correct box.
- Click Add, and then click OK.
For substitutions:
- On the AutoCorrect tab, make sure the Replace text as you type check box is selected.
- In the Replace box, type a word or phrase that you often mistype or misspell — for example, type usualy.
- In the With box, type the correct spelling of the word — for example, type usually.
- Click Add, and then click OK.
Note #1: When you add a word to the Exceptions list, the word is also added to the default custom dictionary in the spelling checker.
Note #2: The Exceptions list is global across the Office programs that support this feature, which means that any change you make to this list in one program also affects the other programs.