The auto correct option is the option from where you can correct the words and store the word for your dictionary.
It is possible from the procedure as shown below.
1) Start MS Word.
2) After that type any sentence what you want or type the document you have been given,
for example you type "sandstone", after that if you want to make a shortcut of that word, then go to File, option,
3 Then go to Proofing tab, after that go to autocorrect option button, then in the replace and with texts, you can place and replace your own words.
4 Also you can store and save your daily own hand writing words and any small sentance.

