User Dictionary
Android tablets come with a built-in dictionary. It's used to make suggestions and correct typos as you type, but it doesn't know about every word you use.
One of the first things I like to do with a new device is add “Marziah” to the user dictionary, so my name doesn't get autocorrected to March, Maryland, or Maria; and so I don't have to type the entire thing out in order to write it. Maybe you also have an unusual name, or you use an acronym at work that throws off the word suggestions. Follow these steps to add a word to the user dictionary in Honeycomb, as shown in Figure 3–5:
Figure 3–5. Adding words to the user dictionary
- Type out the word on your tablet, with no spaces.
- The word suggestions above the keyboard should include the word you've just typed. Long-press on the word in the suggestions area.
- You should see a message saying that the word was “saved.” This means it was added to the user dictionary.
TIP: If you ever want to check the user dictionary, whether to verify that you've added a word or to remove any words that you've accidentally added, go to Settings 
Language and Input User dictionary. You can't add words from this menu, but you can remove undesired words by tapping on the Red X icon to the right of the word.